Merge remote-tracking branch 'osulazer/master' into develop

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "jetbrains.resharper.globaltools": {
-      "version": "2022.1.1",
+      "version": "2022.2.3",
       "commands": [
         "jb"
       ]

.github/workflows/ci.yml

@@ -1,5 +1,11 @@
 on: [push, pull_request]
 name: Continuous Integration
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read # to fetch code (actions/checkout)
 
 jobs:
   inspect-code:
@@ -82,7 +88,7 @@ jobs:
         run: dotnet build -c Debug -warnaserror osu.Desktop.slnf
 
       - name: Test
-        run: dotnet test $pwd/**/*.Tests/bin/Debug/*/*.Tests.dll --logger "trx;LogFileName=TestResults-${{matrix.os.prettyname}}-${{matrix.threadingMode}}.trx"
+        run: dotnet test $pwd/**/*.Tests/bin/Debug/*/*.Tests.dll --logger "trx;LogFileName=TestResults-${{matrix.os.prettyname}}-${{matrix.threadingMode}}.trx" -- NUnit.ConsoleOut=0
         shell: pwsh
 
       # Attempt to upload results even if test fails.

.github/workflows/report-nunit.yml

@@ -8,8 +8,12 @@ on:
     workflows: ["Continuous Integration"]
     types:
       - completed
+permissions: {}
 jobs:
   annotate:
+    permissions:
+      checks: write # to create checks (dorny/test-reporter)
+
     name: Annotate CI run with test results
     runs-on: ubuntu-latest
     if: ${{ github.event.workflow_run.conclusion != 'cancelled' }}

.github/workflows/sentry-release.yml

@@ -5,6 +5,9 @@ on:
     tags:
       - '*'
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   sentry_release:
     runs-on: ubuntu-latest

CodeAnalysis/BannedSymbols.txt

@@ -6,8 +6,6 @@ T:System.IComparable;Don't use non-generic IComparable. Use generic version inst
 T:SixLabors.ImageSharp.IDeepCloneable`1;Use osu.Game.Utils.IDeepCloneable<T> instead.
 M:osu.Framework.Graphics.Sprites.SpriteText.#ctor;Use OsuSpriteText.
 M:osu.Framework.Bindables.IBindableList`1.GetBoundCopy();Fails on iOS. Use manual ctor + BindTo instead. (see https://github.com/mono/mono/issues/19900)
-T:Microsoft.EntityFrameworkCore.Internal.EnumerableExtensions;Don't use internal extension methods.
-T:Microsoft.EntityFrameworkCore.Internal.TypeExtensions;Don't use internal extension methods.
 T:NuGet.Packaging.CollectionExtensions;Don't use internal extension methods.
 M:System.Enum.HasFlag(System.Enum);Use osu.Framework.Extensions.EnumExtensions.HasFlagFast<T>() instead.
 M:Realms.IRealmCollection`1.SubscribeForNotifications`1(Realms.NotificationCallbackDelegate{``0});Use osu.Game.Database.RealmObjectExtensions.QueryAsyncWithNotifications(IRealmCollection<T>,NotificationCallbackDelegate<T>) instead.

Templates/Rulesets/ruleset-empty/osu.Game.Rulesets.EmptyFreeform.Tests/osu.Game.Rulesets.EmptyFreeform.Tests.csproj

@@ -9,10 +9,9 @@
       <GenerateProgramFile>false</GenerateProgramFile>
     </PropertyGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
-    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\osu.Game.Rulesets.EmptyFreeform\osu.Game.Rulesets.EmptyFreeform.csproj" />

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon.Tests/osu.Game.Rulesets.Pippidon.Tests.csproj

@@ -9,10 +9,9 @@
     <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
-    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\osu.Game.Rulesets.Pippidon\osu.Game.Rulesets.Pippidon.csproj" />

Templates/Rulesets/ruleset-scrolling-empty/osu.Game.Rulesets.EmptyScrolling.Tests/osu.Game.Rulesets.EmptyScrolling.Tests.csproj

@@ -9,10 +9,9 @@
     <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
-    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\osu.Game.Rulesets.EmptyScrolling\osu.Game.Rulesets.EmptyScrolling.csproj" />

Templates/Rulesets/ruleset-scrolling-example/osu.Game.Rulesets.Pippidon.Tests/osu.Game.Rulesets.Pippidon.Tests.csproj

@@ -9,10 +9,9 @@
     <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
-    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\osu.Game.Rulesets.Pippidon\osu.Game.Rulesets.Pippidon.csproj" />

osu.Android.props

@@ -51,11 +51,11 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2022.831.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2022.908.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2022.1005.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2022.1005.0" />
   </ItemGroup>
   <ItemGroup Label="Transitive Dependencies">
     <!-- Realm needs to be directly referenced in all Xamarin projects, as it will not pull in its transitive dependencies otherwise. -->
-    <PackageReference Include="Realm" Version="10.15.1" />
+    <PackageReference Include="Realm" Version="10.17.0" />
   </ItemGroup>
 </Project>

osu.Desktop/OsuGameDesktop.cs

@@ -137,12 +137,13 @@ namespace osu.Desktop
         {
             base.SetHost(host);
 
-            var iconStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico");
-
             var desktopWindow = (SDL2DesktopWindow)host.Window;
 
-            desktopWindow.CursorState |= CursorState.Hidden;
+            var iconStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico");
+            if (iconStream != null)
                 desktopWindow.SetIconFromStream(iconStream);
+
+            desktopWindow.CursorState |= CursorState.Hidden;
             desktopWindow.Title = Name;
             desktopWindow.DragDrop += f => fileDrop(new[] { f });
         }

osu.Desktop/Updater/SquirrelUpdateManager.cs

@@ -5,26 +5,24 @@ using System;
 using System.Runtime.Versioning;
 using System.Threading.Tasks;
 using osu.Framework.Allocation;
-using osu.Framework.Graphics;
-using osu.Framework.Graphics.Sprites;
 using osu.Framework.Logging;
 using osu.Game;
-using osu.Game.Graphics;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Notifications;
-using osuTK;
 using Squirrel;
 using Squirrel.SimpleSplat;
+using LogLevel = Squirrel.SimpleSplat.LogLevel;
+using UpdateManager = osu.Game.Updater.UpdateManager;
 
 namespace osu.Desktop.Updater
 {
     [SupportedOSPlatform("windows")]
-    public class SquirrelUpdateManager : osu.Game.Updater.UpdateManager
+    public class SquirrelUpdateManager : UpdateManager
     {
-        private UpdateManager? updateManager;
+        private Squirrel.UpdateManager? updateManager;
         private INotificationOverlay notificationOverlay = null!;
 
-        public Task PrepareUpdateAsync() => UpdateManager.RestartAppWhenExited();
+        public Task PrepareUpdateAsync() => Squirrel.UpdateManager.RestartAppWhenExited();
 
         private static readonly Logger logger = Logger.GetLogger("updater");
 
@@ -35,6 +33,9 @@ namespace osu.Desktop.Updater
 
         private readonly SquirrelLogger squirrelLogger = new SquirrelLogger();
 
+        [Resolved]
+        private OsuGameBase game { get; set; } = null!;
+
         [BackgroundDependencyLoader]
         private void load(INotificationOverlay notifications)
         {
@@ -63,7 +64,14 @@ namespace osu.Desktop.Updater
                     if (updatePending)
                     {
                         // the user may have dismissed the completion notice, so show it again.
-                        notificationOverlay.Post(new UpdateCompleteNotification(this));
+                        notificationOverlay.Post(new UpdateApplicationCompleteNotification
+                        {
+                            Activated = () =>
+                            {
+                                restartToApplyUpdate();
+                                return true;
+                            },
+                        });
                         return true;
                     }
 
@@ -75,19 +83,21 @@ namespace osu.Desktop.Updater
 
                 if (notification == null)
                 {
-                    notification = new UpdateProgressNotification(this) { State = ProgressNotificationState.Active };
+                    notification = new UpdateProgressNotification
+                    {
+                        CompletionClickAction = restartToApplyUpdate,
+                    };
+
                     Schedule(() => notificationOverlay.Post(notification));
                 }
 
-                notification.Progress = 0;
-                notification.Text = @"Downloading update...";
+                notification.StartDownload();
 
                 try
                 {
                     await updateManager.DownloadReleases(info.ReleasesToApply, p => notification.Progress = p / 100f).ConfigureAwait(false);
 
-                    notification.Progress = 0;
-                    notification.Text = @"Installing update...";
+                    notification.StartInstall();
 
                     await updateManager.ApplyReleases(info, p => notification.Progress = p / 100f).ConfigureAwait(false);
 
@@ -107,9 +117,7 @@ namespace osu.Desktop.Updater
                     else
                     {
                         // In the case of an error, a separate notification will be displayed.
-                        notification.State = ProgressNotificationState.Cancelled;
-                        notification.Close();
-
+                        notification.FailDownload();
                         Logger.Error(e, @"update failed!");
                     }
                 }
@@ -131,78 +139,24 @@ namespace osu.Desktop.Updater
             return true;
         }
 
+        private bool restartToApplyUpdate()
+        {
+            PrepareUpdateAsync()
+                .ContinueWith(_ => Schedule(() => game.AttemptExit()));
+            return true;
+        }
+
         protected override void Dispose(bool isDisposing)
         {
             base.Dispose(isDisposing);
             updateManager?.Dispose();
         }
 
-        private class UpdateCompleteNotification : ProgressCompletionNotification
-        {
-            [Resolved]
-            private OsuGame game { get; set; } = null!;
-
-            public UpdateCompleteNotification(SquirrelUpdateManager updateManager)
-            {
-                Text = @"Update ready to install. Click to restart!";
-
-                Activated = () =>
-                {
-                    updateManager.PrepareUpdateAsync()
-                                 .ContinueWith(_ => updateManager.Schedule(() => game.AttemptExit()));
-                    return true;
-                };
-            }
-        }
-
-        private class UpdateProgressNotification : ProgressNotification
-        {
-            private readonly SquirrelUpdateManager updateManager;
-
-            public UpdateProgressNotification(SquirrelUpdateManager updateManager)
-            {
-                this.updateManager = updateManager;
-            }
-
-            protected override Notification CreateCompletionNotification()
-            {
-                return new UpdateCompleteNotification(updateManager);
-            }
-
-            [BackgroundDependencyLoader]
-            private void load(OsuColour colours)
-            {
-                IconContent.AddRange(new Drawable[]
-                {
-                    new SpriteIcon
-                    {
-                        Anchor = Anchor.Centre,
-                        Origin = Anchor.Centre,
-                        Icon = FontAwesome.Solid.Upload,
-                        Size = new Vector2(20),
-                    }
-                });
-            }
-
-            public override void Close()
-            {
-                // cancelling updates is not currently supported by the underlying updater.
-                // only allow dismissing for now.
-
-                switch (State)
-                {
-                    case ProgressNotificationState.Cancelled:
-                        base.Close();
-                        break;
-                }
-            }
-        }
-
         private class SquirrelLogger : ILogger, IDisposable
         {
-            public Squirrel.SimpleSplat.LogLevel Level { get; set; } = Squirrel.SimpleSplat.LogLevel.Info;
+            public LogLevel Level { get; set; } = LogLevel.Info;
 
-            public void Write(string message, Squirrel.SimpleSplat.LogLevel logLevel)
+            public void Write(string message, LogLevel logLevel)
             {
                 if (logLevel < Level)
                     return;

osu.Desktop/osu.Desktop.csproj

@@ -24,11 +24,6 @@
     <PackageReference Include="Clowd.Squirrel" Version="2.9.42" />
     <PackageReference Include="Mono.Posix.NETStandard" Version="1.0.0" />
     <PackageReference Include="System.IO.Packaging" Version="6.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="5.0.14" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.14">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-    </PackageReference>
     <PackageReference Include="DiscordRichPresence" Version="1.0.175" />
   </ItemGroup>
   <ItemGroup Label="Resources">

osu.Game.Benchmarks/osu.Game.Benchmarks.csproj

@@ -7,9 +7,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.1" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.2" />
     <PackageReference Include="nunit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
 
   <ItemGroup>

osu.Game.Rulesets.Catch.Tests/TestSceneCatchTouchInput.cs

@@ -1,10 +1,15 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Graphics;
 using osu.Framework.Testing;
+using osu.Game.Rulesets.Catch.Beatmaps;
+using osu.Game.Rulesets.Catch.Mods;
 using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Rulesets.Mods;
 using osu.Game.Tests.Visual;
 
 namespace osu.Game.Rulesets.Catch.Tests
@@ -12,11 +17,11 @@ namespace osu.Game.Rulesets.Catch.Tests
     [TestFixture]
     public class TestSceneCatchTouchInput : OsuTestScene
     {
-        private CatchTouchInputMapper catchTouchInputMapper = null!;
-
-        [SetUpSteps]
-        public void SetUpSteps()
+        [Test]
+        public void TestBasic()
         {
+            CatchTouchInputMapper catchTouchInputMapper = null!;
+
             AddStep("create input overlay", () =>
             {
                 Child = new CatchInputManager(new CatchRuleset().RulesetInfo)
@@ -32,12 +37,30 @@ namespace osu.Game.Rulesets.Catch.Tests
                     }
                 };
             });
+
+            AddStep("show overlay", () => catchTouchInputMapper.Show());
         }
 
         [Test]
-        public void TestBasic()
+        public void TestWithoutRelax()
         {
-            AddStep("show overlay", () => catchTouchInputMapper.Show());
+            AddStep("create drawable ruleset without relax mod", () =>
+            {
+                Child = new DrawableCatchRuleset(new CatchRuleset(), new CatchBeatmap(), new List<Mod>());
+            });
+            AddUntilStep("wait for load", () => Child.IsLoaded);
+            AddAssert("check touch input is shown", () => this.ChildrenOfType<CatchTouchInputMapper>().Any());
+        }
+
+        [Test]
+        public void TestWithRelax()
+        {
+            AddStep("create drawable ruleset with relax mod", () =>
+            {
+                Child = new DrawableCatchRuleset(new CatchRuleset(), new CatchBeatmap(), new List<Mod> { new CatchModRelax() });
+            });
+            AddUntilStep("wait for load", () => Child.IsLoaded);
+            AddAssert("check touch input is not shown", () => !this.ChildrenOfType<CatchTouchInputMapper>().Any());
         }
     }
 }

osu.Game.Rulesets.Mania.Tests/ManiaSpecialColumnTest.cs

@@ -0,0 +1,49 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+#nullable disable
+
+using System.Collections.Generic;
+using osu.Game.Rulesets.Mania.Beatmaps;
+using NUnit.Framework;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [TestFixture]
+    public class ManiaSpecialColumnTest
+    {
+        [TestCase(new[]
+        {
+            true
+        }, 1)]
+        [TestCase(new[]
+        {
+            false,
+            false,
+            false,
+            false
+        }, 4)]
+        [TestCase(new[]
+        {
+            false,
+            false,
+            false,
+            true,
+            false,
+            false,
+            false
+        }, 7)]
+        public void Test(IEnumerable<bool> special, int columns)
+        {
+            var definition = new StageDefinition(columns);
+            var results = getResults(definition);
+            Assert.AreEqual(special, results);
+        }
+
+        private IEnumerable<bool> getResults(StageDefinition definition)
+        {
+            for (int i = 0; i < definition.Columns; i++)
+                yield return definition.IsSpecialColumn(i);
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/Skinning/TestSceneBarLine.cs

@@ -23,7 +23,7 @@ namespace osu.Game.Rulesets.Mania.Tests.Skinning
         {
             var stageDefinitions = new List<StageDefinition>
             {
-                new StageDefinition { Columns = 4 },
+                new StageDefinition(4),
             };
 
             SetContents(_ => new ManiaPlayfield(stageDefinitions).With(s =>

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonHitExplosion.cs

@@ -0,0 +1,97 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Utils;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    public class ArgonHitExplosion : CompositeDrawable, IHitExplosion
+    {
+        public override bool RemoveWhenNotAlive => true;
+
+        [Resolved]
+        private Column column { get; set; } = null!;
+
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+
+        private Container largeFaint = null!;
+
+        private Bindable<Color4> accentColour = null!;
+
+        public ArgonHitExplosion()
+        {
+            Origin = Anchor.Centre;
+
+            RelativeSizeAxes = Axes.X;
+            Height = ArgonNotePiece.NOTE_HEIGHT;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(IScrollingInfo scrollingInfo)
+        {
+            InternalChildren = new Drawable[]
+            {
+                largeFaint = new Container
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    CornerRadius = ArgonNotePiece.CORNER_RADIUS,
+                    Blending = BlendingParameters.Additive,
+                    Child = new Box
+                    {
+                        Colour = Color4.White,
+                        RelativeSizeAxes = Axes.Both,
+                    },
+                },
+            };
+
+            direction.BindTo(scrollingInfo.Direction);
+            direction.BindValueChanged(onDirectionChanged, true);
+
+            accentColour = column.AccentColour.GetBoundCopy();
+            accentColour.BindValueChanged(colour =>
+            {
+                largeFaint.Colour = Interpolation.ValueAt(0.8f, colour.NewValue, Color4.White, 0, 1);
+
+                largeFaint.EdgeEffect = new EdgeEffectParameters
+                {
+                    Type = EdgeEffectType.Glow,
+                    Colour = colour.NewValue,
+                    Roundness = 40,
+                    Radius = 60,
+                };
+            }, true);
+        }
+
+        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
+        {
+            if (direction.NewValue == ScrollingDirection.Up)
+            {
+                Anchor = Anchor.TopCentre;
+                Y = ArgonNotePiece.NOTE_HEIGHT / 2;
+            }
+            else
+            {
+                Anchor = Anchor.BottomCentre;
+                Y = -ArgonNotePiece.NOTE_HEIGHT / 2;
+            }
+        }
+
+        public void Animate(JudgementResult result)
+        {
+            this.FadeOutFromOne(PoolableHitExplosion.DURATION, Easing.Out);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonHitTarget.cs

@@ -0,0 +1,47 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    public class ArgonHitTarget : CompositeDrawable
+    {
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+
+        [BackgroundDependencyLoader]
+        private void load(IScrollingInfo scrollingInfo)
+        {
+            RelativeSizeAxes = Axes.X;
+            Height = ArgonNotePiece.NOTE_HEIGHT;
+
+            Masking = true;
+            CornerRadius = ArgonNotePiece.CORNER_RADIUS;
+
+            InternalChildren = new[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Alpha = 0.3f,
+                    Blending = BlendingParameters.Additive,
+                    Colour = Color4.White
+                },
+            };
+
+            direction.BindTo(scrollingInfo.Direction);
+            direction.BindValueChanged(onDirectionChanged, true);
+        }
+
+        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
+        {
+            Anchor = Origin = direction.NewValue == ScrollingDirection.Up ? Anchor.TopLeft : Anchor.BottomLeft;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonHoldBodyPiece.cs

@@ -0,0 +1,97 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Mania.Skinning.Default;
+using osu.Game.Rulesets.Objects.Drawables;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    /// <summary>
+    /// Represents length-wise portion of a hold note.
+    /// </summary>
+    public class ArgonHoldBodyPiece : CompositeDrawable, IHoldNoteBody
+    {
+        protected readonly Bindable<Color4> AccentColour = new Bindable<Color4>();
+        protected readonly IBindable<bool> IsHitting = new Bindable<bool>();
+
+        private Drawable background = null!;
+        private Box foreground = null!;
+
+        public ArgonHoldBodyPiece()
+        {
+            RelativeSizeAxes = Axes.Both;
+
+            // Without this, the width of the body will be slightly larger than the head/tail.
+            Masking = true;
+            CornerRadius = ArgonNotePiece.CORNER_RADIUS;
+            Blending = BlendingParameters.Additive;
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(DrawableHitObject? drawableObject)
+        {
+            InternalChildren = new[]
+            {
+                background = new Box { RelativeSizeAxes = Axes.Both },
+                foreground = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Blending = BlendingParameters.Additive,
+                    Alpha = 0,
+                },
+            };
+
+            if (drawableObject != null)
+            {
+                var holdNote = (DrawableHoldNote)drawableObject;
+
+                AccentColour.BindTo(holdNote.AccentColour);
+                IsHitting.BindTo(holdNote.IsHitting);
+            }
+
+            AccentColour.BindValueChanged(colour =>
+            {
+                background.Colour = colour.NewValue.Darken(1.2f);
+                foreground.Colour = colour.NewValue.Opacity(0.2f);
+            }, true);
+
+            IsHitting.BindValueChanged(hitting =>
+            {
+                const float animation_length = 50;
+
+                foreground.ClearTransforms();
+
+                if (hitting.NewValue)
+                {
+                    // wait for the next sync point
+                    double synchronisedOffset = animation_length * 2 - Time.Current % (animation_length * 2);
+
+                    using (foreground.BeginDelayedSequence(synchronisedOffset))
+                    {
+                        foreground.FadeTo(1, animation_length).Then()
+                                  .FadeTo(0.5f, animation_length)
+                                  .Loop();
+                    }
+                }
+                else
+                {
+                    foreground.FadeOut(animation_length);
+                }
+            });
+        }
+
+        public void Recycle()
+        {
+            foreground.ClearTransforms();
+            foreground.Alpha = 0;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonHoldNoteTailPiece.cs

@@ -0,0 +1,91 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    internal class ArgonHoldNoteTailPiece : CompositeDrawable
+    {
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+        private readonly IBindable<Color4> accentColour = new Bindable<Color4>();
+
+        private readonly Box colouredBox;
+        private readonly Box shadow;
+
+        public ArgonHoldNoteTailPiece()
+        {
+            RelativeSizeAxes = Axes.X;
+            Height = ArgonNotePiece.NOTE_HEIGHT;
+
+            CornerRadius = ArgonNotePiece.CORNER_RADIUS;
+            Masking = true;
+
+            InternalChildren = new Drawable[]
+            {
+                shadow = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                },
+                new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Height = 0.82f,
+                    Masking = true,
+                    CornerRadius = ArgonNotePiece.CORNER_RADIUS,
+                    Children = new Drawable[]
+                    {
+                        colouredBox = new Box
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                        }
+                    }
+                },
+                new Circle
+                {
+                    RelativeSizeAxes = Axes.X,
+                    Height = ArgonNotePiece.CORNER_RADIUS * 2,
+                },
+            };
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(IScrollingInfo scrollingInfo, DrawableHitObject? drawableObject)
+        {
+            direction.BindTo(scrollingInfo.Direction);
+            direction.BindValueChanged(onDirectionChanged, true);
+
+            if (drawableObject != null)
+            {
+                accentColour.BindTo(drawableObject.AccentColour);
+                accentColour.BindValueChanged(onAccentChanged, true);
+            }
+        }
+
+        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
+        {
+            colouredBox.Anchor = colouredBox.Origin = direction.NewValue == ScrollingDirection.Up
+                ? Anchor.TopCentre
+                : Anchor.BottomCentre;
+        }
+
+        private void onAccentChanged(ValueChangedEvent<Color4> accent)
+        {
+            colouredBox.Colour = ColourInfo.GradientVertical(
+                accent.NewValue,
+                accent.NewValue.Darken(0.1f)
+            );
+
+            shadow.Colour = accent.NewValue.Darken(0.5f);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonJudgementPiece.cs

@@ -0,0 +1,193 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Scoring;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    public class ArgonJudgementPiece : CompositeDrawable, IAnimatableJudgement
+    {
+        protected readonly HitResult Result;
+
+        protected SpriteText JudgementText { get; private set; } = null!;
+
+        private RingExplosion? ringExplosion;
+
+        [Resolved]
+        private OsuColour colours { get; set; } = null!;
+
+        public ArgonJudgementPiece(HitResult result)
+        {
+            Result = result;
+            Origin = Anchor.Centre;
+            Y = 160;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                JudgementText = new OsuSpriteText
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Text = Result.GetDescription().ToUpperInvariant(),
+                    Colour = colours.ForHitResult(Result),
+                    Blending = BlendingParameters.Additive,
+                    Spacing = new Vector2(10, 0),
+                    Font = OsuFont.Default.With(size: 28, weight: FontWeight.Regular),
+                },
+            };
+
+            if (Result.IsHit())
+            {
+                AddInternal(ringExplosion = new RingExplosion(Result)
+                {
+                    Colour = colours.ForHitResult(Result),
+                });
+            }
+        }
+
+        /// <summary>
+        /// Plays the default animation for this judgement piece.
+        /// </summary>
+        /// <remarks>
+        /// The base implementation only handles fade (for all result types) and misses.
+        /// Individual rulesets are recommended to implement their appropriate hit animations.
+        /// </remarks>
+        public virtual void PlayAnimation()
+        {
+            switch (Result)
+            {
+                default:
+                    JudgementText
+                        .ScaleTo(Vector2.One)
+                        .ScaleTo(new Vector2(1.4f), 1800, Easing.OutQuint);
+                    break;
+
+                case HitResult.Miss:
+                    this.ScaleTo(1.6f);
+                    this.ScaleTo(1, 100, Easing.In);
+
+                    this.MoveTo(Vector2.Zero);
+                    this.MoveToOffset(new Vector2(0, 100), 800, Easing.InQuint);
+
+                    this.RotateTo(0);
+                    this.RotateTo(40, 800, Easing.InQuint);
+                    break;
+            }
+
+            this.FadeOutFromOne(800);
+
+            ringExplosion?.PlayAnimation();
+        }
+
+        public Drawable? GetAboveHitObjectsProxiedContent() => null;
+
+        private class RingExplosion : CompositeDrawable
+        {
+            private readonly float travel = 52;
+
+            public RingExplosion(HitResult result)
+            {
+                const float thickness = 4;
+
+                const float small_size = 9;
+                const float large_size = 14;
+
+                Anchor = Anchor.Centre;
+                Origin = Anchor.Centre;
+
+                Blending = BlendingParameters.Additive;
+
+                int countSmall = 0;
+                int countLarge = 0;
+
+                switch (result)
+                {
+                    case HitResult.Meh:
+                        countSmall = 3;
+                        travel *= 0.3f;
+                        break;
+
+                    case HitResult.Ok:
+                    case HitResult.Good:
+                        countSmall = 4;
+                        travel *= 0.6f;
+                        break;
+
+                    case HitResult.Great:
+                    case HitResult.Perfect:
+                        countSmall = 4;
+                        countLarge = 4;
+                        break;
+                }
+
+                for (int i = 0; i < countSmall; i++)
+                    AddInternal(new RingPiece(thickness) { Size = new Vector2(small_size) });
+
+                for (int i = 0; i < countLarge; i++)
+                    AddInternal(new RingPiece(thickness) { Size = new Vector2(large_size) });
+            }
+
+            public void PlayAnimation()
+            {
+                foreach (var c in InternalChildren)
+                {
+                    const float start_position_ratio = 0.3f;
+
+                    float direction = RNG.NextSingle(0, 360);
+                    float distance = RNG.NextSingle(travel / 2, travel);
+
+                    c.MoveTo(new Vector2(
+                        MathF.Cos(direction) * distance * start_position_ratio,
+                        MathF.Sin(direction) * distance * start_position_ratio
+                    ));
+
+                    c.MoveTo(new Vector2(
+                        MathF.Cos(direction) * distance,
+                        MathF.Sin(direction) * distance
+                    ), 600, Easing.OutQuint);
+                }
+
+                this.FadeOutFromOne(1000, Easing.OutQuint);
+            }
+
+            public class RingPiece : CircularContainer
+            {
+                public RingPiece(float thickness = 9)
+                {
+                    Anchor = Anchor.Centre;
+                    Origin = Anchor.Centre;
+
+                    Masking = true;
+                    BorderThickness = thickness;
+                    BorderColour = Color4.White;
+
+                    Child = new Box
+                    {
+                        AlwaysPresent = true,
+                        Alpha = 0,
+                        RelativeSizeAxes = Axes.Both
+                    };
+                }
+            }
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonKeyArea.cs

@@ -0,0 +1,272 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Bindings;
+using osu.Framework.Input.Events;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    public class ArgonKeyArea : CompositeDrawable, IKeyBindingHandler<ManiaAction>
+    {
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+
+        private Container directionContainer = null!;
+        private Drawable background = null!;
+
+        private Circle hitTargetLine = null!;
+
+        private Container<Circle> bottomIcon = null!;
+        private CircularContainer topIcon = null!;
+
+        private Bindable<Color4> accentColour = null!;
+
+        [Resolved]
+        private Column column { get; set; } = null!;
+
+        public ArgonKeyArea()
+        {
+            RelativeSizeAxes = Axes.Both;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(IScrollingInfo scrollingInfo)
+        {
+            const float icon_circle_size = 8;
+            const float icon_spacing = 7;
+            const float icon_vertical_offset = -30;
+
+            InternalChild = directionContainer = new Container
+            {
+                RelativeSizeAxes = Axes.X,
+                // Ensure the area is tall enough to put the target line in the correct location.
+                // This is to also allow the main background component to overlap the target line
+                // and avoid an inner corner radius being shown below the target line.
+                Height = Stage.HIT_TARGET_POSITION + ArgonNotePiece.CORNER_RADIUS * 2,
+                Children = new[]
+                {
+                    new Container
+                    {
+                        Masking = true,
+                        RelativeSizeAxes = Axes.Both,
+                        CornerRadius = ArgonNotePiece.CORNER_RADIUS,
+                        Child = background = new Box
+                        {
+                            Name = "Key gradient",
+                            Alpha = 0,
+                            RelativeSizeAxes = Axes.Both,
+                        },
+                    },
+                    hitTargetLine = new Circle
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        Colour = OsuColour.Gray(196 / 255f),
+                        Height = ArgonNotePiece.CORNER_RADIUS * 2,
+                        Masking = true,
+                        EdgeEffect = new EdgeEffectParameters { Type = EdgeEffectType.Glow },
+                    },
+                    new Container
+                    {
+                        Name = "Icons",
+                        RelativeSizeAxes = Axes.Both,
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        Children = new Drawable[]
+                        {
+                            bottomIcon = new Container<Circle>
+                            {
+                                AutoSizeAxes = Axes.Both,
+                                Anchor = Anchor.BottomCentre,
+                                Origin = Anchor.Centre,
+                                Blending = BlendingParameters.Additive,
+                                Y = icon_vertical_offset,
+                                Children = new[]
+                                {
+                                    new Circle
+                                    {
+                                        Size = new Vector2(icon_circle_size),
+                                        Anchor = Anchor.BottomCentre,
+                                        Origin = Anchor.Centre,
+                                        EdgeEffect = new EdgeEffectParameters { Type = EdgeEffectType.Glow },
+                                    },
+                                    new Circle
+                                    {
+                                        X = -icon_spacing,
+                                        Y = icon_spacing * 1.2f,
+                                        Size = new Vector2(icon_circle_size),
+                                        Anchor = Anchor.BottomCentre,
+                                        Origin = Anchor.Centre,
+                                        EdgeEffect = new EdgeEffectParameters { Type = EdgeEffectType.Glow },
+                                    },
+                                    new Circle
+                                    {
+                                        X = icon_spacing,
+                                        Y = icon_spacing * 1.2f,
+                                        Size = new Vector2(icon_circle_size),
+                                        Anchor = Anchor.BottomCentre,
+                                        Origin = Anchor.Centre,
+                                        EdgeEffect = new EdgeEffectParameters { Type = EdgeEffectType.Glow },
+                                    },
+                                }
+                            },
+                            topIcon = new CircularContainer
+                            {
+                                Anchor = Anchor.TopCentre,
+                                Origin = Anchor.Centre,
+                                Y = -icon_vertical_offset,
+                                Size = new Vector2(22, 14),
+                                Masking = true,
+                                BorderThickness = 4,
+                                BorderColour = Color4.White,
+                                EdgeEffect = new EdgeEffectParameters { Type = EdgeEffectType.Glow },
+                                Children = new Drawable[]
+                                {
+                                    new Box
+                                    {
+                                        RelativeSizeAxes = Axes.Both,
+                                        Alpha = 0,
+                                        AlwaysPresent = true,
+                                    },
+                                },
+                            }
+                        }
+                    },
+                }
+            };
+
+            direction.BindTo(scrollingInfo.Direction);
+            direction.BindValueChanged(onDirectionChanged, true);
+
+            accentColour = column.AccentColour.GetBoundCopy();
+            accentColour.BindValueChanged(colour =>
+                {
+                    background.Colour = colour.NewValue.Darken(0.2f);
+                    bottomIcon.Colour = colour.NewValue;
+                },
+                true);
+
+            // Yes, proxy everything.
+            column.TopLevelContainer.Add(CreateProxy());
+        }
+
+        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
+        {
+            switch (direction.NewValue)
+            {
+                case ScrollingDirection.Up:
+                    directionContainer.Scale = new Vector2(1, -1);
+                    directionContainer.Anchor = Anchor.TopLeft;
+                    directionContainer.Origin = Anchor.BottomLeft;
+                    break;
+
+                case ScrollingDirection.Down:
+                    directionContainer.Scale = new Vector2(1, 1);
+                    directionContainer.Anchor = Anchor.BottomLeft;
+                    directionContainer.Origin = Anchor.BottomLeft;
+                    break;
+            }
+        }
+
+        public bool OnPressed(KeyBindingPressEvent<ManiaAction> e)
+        {
+            if (e.Action != column.Action.Value) return false;
+
+            const double lighting_fade_in_duration = 70;
+            Color4 lightingColour = getLightingColour();
+
+            background
+                .FlashColour(accentColour.Value.Lighten(0.8f), 200, Easing.OutQuint)
+                .FadeTo(1, lighting_fade_in_duration, Easing.OutQuint)
+                .Then()
+                .FadeTo(0.8f, 500);
+
+            hitTargetLine.FadeColour(Color4.White, lighting_fade_in_duration, Easing.OutQuint);
+            hitTargetLine.TransformTo(nameof(EdgeEffect), new EdgeEffectParameters
+            {
+                Type = EdgeEffectType.Glow,
+                Colour = lightingColour.Opacity(0.4f),
+                Radius = 20,
+            }, lighting_fade_in_duration, Easing.OutQuint);
+
+            topIcon.ScaleTo(0.9f, lighting_fade_in_duration, Easing.OutQuint);
+            topIcon.TransformTo(nameof(EdgeEffect), new EdgeEffectParameters
+            {
+                Type = EdgeEffectType.Glow,
+                Colour = lightingColour.Opacity(0.1f),
+                Radius = 20,
+            }, lighting_fade_in_duration, Easing.OutQuint);
+
+            bottomIcon.FadeColour(Color4.White, lighting_fade_in_duration, Easing.OutQuint);
+
+            foreach (var circle in bottomIcon)
+            {
+                circle.TransformTo(nameof(EdgeEffect), new EdgeEffectParameters
+                {
+                    Type = EdgeEffectType.Glow,
+                    Colour = lightingColour.Opacity(0.2f),
+                    Radius = 60,
+                }, lighting_fade_in_duration, Easing.OutQuint);
+            }
+
+            return false;
+        }
+
+        public void OnReleased(KeyBindingReleaseEvent<ManiaAction> e)
+        {
+            if (e.Action != column.Action.Value) return;
+
+            const double lighting_fade_out_duration = 800;
+
+            Color4 lightingColour = getLightingColour().Opacity(0);
+
+            // background fades out faster than lighting elements to give better definition to the player.
+            background.FadeTo(0.3f, 50, Easing.OutQuint)
+                      .Then()
+                      .FadeOut(lighting_fade_out_duration, Easing.OutQuint);
+
+            topIcon.ScaleTo(1f, 200, Easing.OutQuint);
+            topIcon.TransformTo(nameof(EdgeEffect), new EdgeEffectParameters
+            {
+                Type = EdgeEffectType.Glow,
+                Colour = lightingColour,
+                Radius = 20,
+            }, lighting_fade_out_duration, Easing.OutQuint);
+
+            hitTargetLine.FadeColour(OsuColour.Gray(196 / 255f), lighting_fade_out_duration, Easing.OutQuint);
+            hitTargetLine.TransformTo(nameof(EdgeEffect), new EdgeEffectParameters
+            {
+                Type = EdgeEffectType.Glow,
+                Colour = lightingColour,
+                Radius = 25,
+            }, lighting_fade_out_duration, Easing.OutQuint);
+
+            bottomIcon.FadeColour(accentColour.Value, lighting_fade_out_duration, Easing.OutQuint);
+
+            foreach (var circle in bottomIcon)
+            {
+                circle.TransformTo(nameof(EdgeEffect), new EdgeEffectParameters
+                {
+                    Type = EdgeEffectType.Glow,
+                    Colour = lightingColour,
+                    Radius = 30,
+                }, lighting_fade_out_duration, Easing.OutQuint);
+            }
+        }
+
+        private Color4 getLightingColour() => Interpolation.ValueAt(0.2f, accentColour.Value, Color4.White, 0, 1);
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonNotePiece.cs

@@ -0,0 +1,110 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    internal class ArgonNotePiece : CompositeDrawable
+    {
+        public const float NOTE_HEIGHT = 42;
+
+        public const float CORNER_RADIUS = 3.4f;
+
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+        private readonly IBindable<Color4> accentColour = new Bindable<Color4>();
+
+        private readonly Box colouredBox;
+        private readonly Box shadow;
+
+        public ArgonNotePiece()
+        {
+            RelativeSizeAxes = Axes.X;
+            Height = NOTE_HEIGHT;
+
+            CornerRadius = CORNER_RADIUS;
+            Masking = true;
+
+            InternalChildren = new Drawable[]
+            {
+                shadow = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                },
+                new Container
+                {
+                    Anchor = Anchor.BottomLeft,
+                    Origin = Anchor.BottomLeft,
+                    RelativeSizeAxes = Axes.Both,
+                    Height = 0.82f,
+                    Masking = true,
+                    CornerRadius = CORNER_RADIUS,
+                    Children = new Drawable[]
+                    {
+                        colouredBox = new Box
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                        }
+                    }
+                },
+                new Circle
+                {
+                    Anchor = Anchor.BottomLeft,
+                    Origin = Anchor.BottomLeft,
+                    RelativeSizeAxes = Axes.X,
+                    Height = CORNER_RADIUS * 2,
+                },
+                new SpriteIcon
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Y = 4,
+                    Icon = FontAwesome.Solid.AngleDown,
+                    Size = new Vector2(20),
+                    Scale = new Vector2(1, 0.7f)
+                }
+            };
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(IScrollingInfo scrollingInfo, DrawableHitObject? drawableObject)
+        {
+            direction.BindTo(scrollingInfo.Direction);
+            direction.BindValueChanged(onDirectionChanged, true);
+
+            if (drawableObject != null)
+            {
+                accentColour.BindTo(drawableObject.AccentColour);
+                accentColour.BindValueChanged(onAccentChanged, true);
+            }
+        }
+
+        private void onDirectionChanged(ValueChangedEvent<ScrollingDirection> direction)
+        {
+            colouredBox.Anchor = colouredBox.Origin = direction.NewValue == ScrollingDirection.Up
+                ? Anchor.TopCentre
+                : Anchor.BottomCentre;
+        }
+
+        private void onAccentChanged(ValueChangedEvent<Color4> accent)
+        {
+            colouredBox.Colour = ColourInfo.GradientVertical(
+                accent.NewValue.Lighten(0.1f),
+                accent.NewValue
+            );
+
+            shadow.Colour = accent.NewValue.Darken(0.5f);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ArgonStageBackground.cs

@@ -0,0 +1,16 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    public class ArgonStageBackground : CompositeDrawable
+    {
+        public ArgonStageBackground()
+        {
+            RelativeSizeAxes = Axes.Both;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs

@@ -0,0 +1,139 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.Beatmaps;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Skinning;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Argon
+{
+    public class ManiaArgonSkinTransformer : SkinTransformer
+    {
+        private readonly ManiaBeatmap beatmap;
+
+        public ManiaArgonSkinTransformer(ISkin skin, IBeatmap beatmap)
+            : base(skin)
+        {
+            this.beatmap = (ManiaBeatmap)beatmap;
+        }
+
+        public override Drawable? GetDrawableComponent(ISkinComponent component)
+        {
+            switch (component)
+            {
+                case GameplaySkinComponent<HitResult> resultComponent:
+                    return new ArgonJudgementPiece(resultComponent.Component);
+
+                case ManiaSkinComponent maniaComponent:
+                    // TODO: Once everything is finalised, consider throwing UnsupportedSkinComponentException on missing entries.
+                    switch (maniaComponent.Component)
+                    {
+                        case ManiaSkinComponents.StageBackground:
+                            return new ArgonStageBackground();
+
+                        case ManiaSkinComponents.ColumnBackground:
+                            return new ArgonColumnBackground();
+
+                        case ManiaSkinComponents.HoldNoteBody:
+                            return new ArgonHoldBodyPiece();
+
+                        case ManiaSkinComponents.HoldNoteTail:
+                            return new ArgonHoldNoteTailPiece();
+
+                        case ManiaSkinComponents.HoldNoteHead:
+                        case ManiaSkinComponents.Note:
+                            return new ArgonNotePiece();
+
+                        case ManiaSkinComponents.HitTarget:
+                            return new ArgonHitTarget();
+
+                        case ManiaSkinComponents.KeyArea:
+                            return new ArgonKeyArea();
+
+                        case ManiaSkinComponents.HitExplosion:
+                            return new ArgonHitExplosion();
+                    }
+
+                    break;
+            }
+
+            return base.GetDrawableComponent(component);
+        }
+
+        public override IBindable<TValue>? GetConfig<TLookup, TValue>(TLookup lookup)
+        {
+            if (lookup is ManiaSkinConfigurationLookup maniaLookup)
+            {
+                int column = maniaLookup.ColumnIndex ?? 0;
+                var stage = beatmap.GetStageForColumnIndex(column);
+
+                switch (maniaLookup.Lookup)
+                {
+                    case LegacyManiaSkinConfigurationLookups.ColumnSpacing:
+                        return SkinUtils.As<TValue>(new Bindable<float>(2));
+
+                    case LegacyManiaSkinConfigurationLookups.StagePaddingBottom:
+                    case LegacyManiaSkinConfigurationLookups.StagePaddingTop:
+                        return SkinUtils.As<TValue>(new Bindable<float>(30));
+
+                    case LegacyManiaSkinConfigurationLookups.ColumnWidth:
+                        return SkinUtils.As<TValue>(new Bindable<float>(
+                            stage.IsSpecialColumn(column) ? 120 : 60
+                        ));
+
+                    case LegacyManiaSkinConfigurationLookups.ColumnBackgroundColour:
+
+                        Color4 colour;
+
+                        if (stage.IsSpecialColumn(column))
+                            colour = new Color4(159, 101, 255, 255);
+                        else
+                        {
+                            switch (column % 8)
+                            {
+                                default:
+                                    colour = new Color4(240, 216, 0, 255);
+                                    break;
+
+                                case 1:
+                                    colour = new Color4(240, 101, 0, 255);
+                                    break;
+
+                                case 2:
+                                    colour = new Color4(240, 0, 130, 255);
+                                    break;
+
+                                case 3:
+                                    colour = new Color4(192, 0, 240, 255);
+                                    break;
+
+                                case 4:
+                                    colour = new Color4(178, 0, 240, 255);
+                                    break;
+
+                                case 5:
+                                    colour = new Color4(0, 96, 240, 255);
+                                    break;
+
+                                case 6:
+                                    colour = new Color4(0, 226, 240, 255);
+                                    break;
+
+                                case 7:
+                                    colour = new Color4(0, 240, 96, 255);
+                                    break;
+                            }
+                        }
+
+                        return SkinUtils.As<TValue>(new Bindable<Color4>(colour));
+                }
+            }
+
+            return base.GetConfig<TLookup, TValue>(lookup);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Default/ManiaTrianglesSkinTransformer.cs

@@ -0,0 +1,49 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using osu.Framework.Bindables;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.Beatmaps;
+using osu.Game.Skinning;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Default
+{
+    public class ManiaTrianglesSkinTransformer : SkinTransformer
+    {
+        private readonly ManiaBeatmap beatmap;
+
+        public ManiaTrianglesSkinTransformer(ISkin skin, IBeatmap beatmap)
+            : base(skin)
+        {
+            this.beatmap = (ManiaBeatmap)beatmap;
+        }
+
+        private readonly Color4 colourEven = new Color4(6, 84, 0, 255);
+        private readonly Color4 colourOdd = new Color4(94, 0, 57, 255);
+        private readonly Color4 colourSpecial = new Color4(0, 48, 63, 255);
+
+        public override IBindable<TValue>? GetConfig<TLookup, TValue>(TLookup lookup)
+        {
+            if (lookup is ManiaSkinConfigurationLookup maniaLookup)
+            {
+                switch (maniaLookup.Lookup)
+                {
+                    case LegacyManiaSkinConfigurationLookups.ColumnBackgroundColour:
+                        int column = maniaLookup.ColumnIndex ?? 0;
+
+                        var stage = beatmap.GetStageForColumnIndex(column);
+
+                        if (stage.IsSpecialColumn(column))
+                            return SkinUtils.As<TValue>(new Bindable<Color4>(colourSpecial));
+
+                        int distanceToEdge = Math.Min(column, (stage.Columns - 1) - column);
+                        return SkinUtils.As<TValue>(new Bindable<Color4>(distanceToEdge % 2 == 0 ? colourOdd : colourEven));
+                }
+            }
+
+            return base.GetConfig<TLookup, TValue>(lookup);
+        }
+    }
+}

osu.Game.Rulesets.Mania/Skinning/Legacy/ManiaClassicSkinTransformer.cs

@@ -0,0 +1,38 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Bindables;
+using osu.Game.Beatmaps;
+using osu.Game.Skinning;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Skinning.Legacy
+{
+    public class ManiaClassicSkinTransformer : ManiaLegacySkinTransformer
+    {
+        public ManiaClassicSkinTransformer(ISkin skin, IBeatmap beatmap)
+            : base(skin, beatmap)
+        {
+        }
+
+        public override IBindable<TValue> GetConfig<TLookup, TValue>(TLookup lookup)
+        {
+            if (lookup is ManiaSkinConfigurationLookup maniaLookup)
+            {
+                var baseLookup = base.GetConfig<TLookup, TValue>(lookup);
+
+                if (baseLookup != null)
+                    return baseLookup;
+
+                // default provisioning.
+                switch (maniaLookup.Lookup)
+                {
+                    case LegacyManiaSkinConfigurationLookups.ColumnBackgroundColour:
+                        return SkinUtils.As<TValue>(new Bindable<Color4>(Color4.Black));
+                }
+            }
+
+            return base.GetConfig<TLookup, TValue>(lookup);
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModAlternate.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Timing;
@@ -125,7 +126,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
         /// Ensures alternation is reset before the first hitobject after a break.
         /// </summary>
         [Test]
-        public void TestInputSingularWithBreak() => CreateModTest(new ModTestData
+        public void TestInputSingularWithBreak([Values] bool pressBeforeSecondObject) => CreateModTest(new ModTestData
         {
             Mod = new OsuModAlternate(),
             PassCondition = () => Player.ScoreProcessor.Combo.Value == 0 && Player.ScoreProcessor.HighestCombo.Value == 2,
@@ -155,21 +156,26 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
                     },
                 }
             },
-            ReplayFrames = new List<ReplayFrame>
+            ReplayFrames = new ReplayFrame[]
             {
                 // first press to start alternate lock.
-                new OsuReplayFrame(500, new Vector2(100), OsuAction.LeftButton),
-                new OsuReplayFrame(501, new Vector2(100)),
+                new OsuReplayFrame(450, new Vector2(100), OsuAction.LeftButton),
+                new OsuReplayFrame(451, new Vector2(100)),
+                // press same key at second hitobject and ensure it has been hit.
+                new OsuReplayFrame(2450, new Vector2(500, 100), OsuAction.LeftButton),
+                new OsuReplayFrame(2451, new Vector2(500, 100)),
+                // press same key at third hitobject and ensure it has been missed.
+                new OsuReplayFrame(2950, new Vector2(500, 100), OsuAction.LeftButton),
+                new OsuReplayFrame(2951, new Vector2(500, 100)),
+            }.Concat(!pressBeforeSecondObject
+                ? Enumerable.Empty<ReplayFrame>()
+                : new ReplayFrame[]
+                {
                     // press same key after break but before hit object.
                     new OsuReplayFrame(2250, new Vector2(300, 100), OsuAction.LeftButton),
                     new OsuReplayFrame(2251, new Vector2(300, 100)),
-                // press same key at second hitobject and ensure it has been hit.
-                new OsuReplayFrame(2500, new Vector2(500, 100), OsuAction.LeftButton),
-                new OsuReplayFrame(2501, new Vector2(500, 100)),
-                // press same key at third hitobject and ensure it has been missed.
-                new OsuReplayFrame(3000, new Vector2(500, 100), OsuAction.LeftButton),
-                new OsuReplayFrame(3001, new Vector2(500, 100)),
                 }
+            ).ToList()
         });
     }
 }

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModDifficultyAdjust.cs

@@ -8,7 +8,6 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
-using osu.Game.Graphics.Containers;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
@@ -88,7 +87,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
             if (!objects.Any())
                 return false;
 
-            return objects.All(o => Precision.AlmostEquals(o.ChildrenOfType<ShakeContainer>().First().Children.OfType<Container>().Single().Scale.X, target));
+            return objects.All(o => Precision.AlmostEquals(o.ChildrenOfType<Container>().First().Scale.X, target));
         }
 
         private bool checkSomeHit()

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModRandom.cs

@@ -0,0 +1,102 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Osu.Beatmaps;
+using osu.Game.Rulesets.Osu.Mods;
+using osu.Game.Rulesets.Osu.Objects;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests.Mods
+{
+    public class TestSceneOsuModRandom : OsuModTestScene
+    {
+        [TestCase(1)]
+        [TestCase(7)]
+        [TestCase(10)]
+        public void TestDefaultBeatmap(float angleSharpness) => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModRandom
+            {
+                AngleSharpness = { Value = angleSharpness }
+            },
+            Autoplay = true,
+            PassCondition = () => true
+        });
+
+        [TestCase(1)]
+        [TestCase(7)]
+        [TestCase(10)]
+        public void TestJumpBeatmap(float angleSharpness) => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModRandom
+            {
+                AngleSharpness = { Value = angleSharpness }
+            },
+            Beatmap = jumpBeatmap,
+            Autoplay = true,
+            PassCondition = () => true
+        });
+
+        [TestCase(1)]
+        [TestCase(7)]
+        [TestCase(10)]
+        public void TestStreamBeatmap(float angleSharpness) => CreateModTest(new ModTestData
+        {
+            Mod = new OsuModRandom
+            {
+                AngleSharpness = { Value = angleSharpness }
+            },
+            Beatmap = streamBeatmap,
+            Autoplay = true,
+            PassCondition = () => true
+        });
+
+        private OsuBeatmap jumpBeatmap =>
+            createHitCircleBeatmap(new[] { 100, 200, 300, 400 }, 8, 300, 2 * 300);
+
+        private OsuBeatmap streamBeatmap =>
+            createHitCircleBeatmap(new[] { 10, 20, 30, 40, 50, 60, 70, 80 }, 16, 150, 4 * 150);
+
+        private OsuBeatmap createHitCircleBeatmap(IEnumerable<int> spacings, int objectsPerSpacing, int interval, int beatLength)
+        {
+            var controlPointInfo = new ControlPointInfo();
+            controlPointInfo.Add(0, new TimingControlPoint
+            {
+                Time = 0,
+                BeatLength = beatLength
+            });
+
+            var beatmap = new OsuBeatmap
+            {
+                BeatmapInfo = new BeatmapInfo
+                {
+                    StackLeniency = 0,
+                    Difficulty = new BeatmapDifficulty
+                    {
+                        ApproachRate = 8.5f
+                    }
+                },
+                ControlPointInfo = controlPointInfo
+            };
+
+            foreach (int spacing in spacings)
+            {
+                for (int i = 0; i < objectsPerSpacing; i++)
+                {
+                    beatmap.HitObjects.Add(new HitCircle
+                    {
+                        StartTime = interval * beatmap.HitObjects.Count,
+                        Position = beatmap.HitObjects.Count % 2 == 0 ? Vector2.Zero : new Vector2(spacing, 0),
+                        NewCombo = i == 0
+                    });
+                }
+            }
+
+            return beatmap;
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/TestSceneCursorParticles.cs

@@ -170,7 +170,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             });
             AddStep("setup default legacy skin", () =>
             {
-                skinManager.CurrentSkinInfo.Value = skinManager.DefaultLegacySkin.SkinInfo;
+                skinManager.CurrentSkinInfo.Value = skinManager.DefaultClassicSkin.SkinInfo;
             });
         });
     }

osu.Game.Rulesets.Osu.Tests/TestSceneHitCircle.cs

@@ -58,10 +58,11 @@ namespace osu.Game.Rulesets.Osu.Tests
 
         private Drawable testSingle(float circleSize, bool auto = false, double timeOffset = 0, Vector2? positionOffset = null)
         {
-            var drawable = createSingle(circleSize, auto, timeOffset, positionOffset);
-
             var playfield = new TestOsuPlayfield();
-            playfield.Add(drawable);
+
+            for (double t = timeOffset; t < timeOffset + 60000; t += 2000)
+                playfield.Add(createSingle(circleSize, auto, t, positionOffset));
+
             return playfield;
         }
 

osu.Game.Rulesets.Osu.Tests/TestSceneHitCircleArea.cs

@@ -35,7 +35,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             hitCircle.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
 
-            Child = new SkinProvidingContainer(new DefaultSkin(null))
+            Child = new SkinProvidingContainer(new TrianglesSkin(null))
             {
                 RelativeSizeAxes = Axes.Both,
                 Child = drawableHitCircle = new DrawableHitCircle(hitCircle)

osu.Game.Rulesets.Osu.Tests/TestSceneSliderApplication.cs

@@ -71,7 +71,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                 var tintingSkin = skinManager.GetSkin(DefaultLegacySkin.CreateInfo());
                 tintingSkin.Configuration.ConfigDictionary["AllowSliderBallTint"] = "1";
 
-                var provider = Ruleset.Value.CreateInstance().CreateLegacySkinProvider(tintingSkin, Beatmap.Value.Beatmap);
+                var provider = Ruleset.Value.CreateInstance().CreateSkinTransformer(tintingSkin, Beatmap.Value.Beatmap);
 
                 Child = new SkinProvidingContainer(provider)
                 {

osu.Game.Rulesets.Osu.Tests/TestSceneSmoke.cs

@@ -0,0 +1,136 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Framework.Input.Events;
+using osu.Framework.Input.States;
+using osu.Framework.Logging;
+using osu.Framework.Testing.Input;
+using osu.Game.Rulesets.Osu.UI;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneSmoke : OsuSkinnableTestScene
+    {
+        [Test]
+        public void TestSmoking()
+        {
+            addStep("Create short smoke", 2_000);
+            addStep("Create medium smoke", 5_000);
+            addStep("Create long smoke", 10_000);
+        }
+
+        private void addStep(string stepName, double duration)
+        {
+            var smokeContainers = new List<SmokeContainer>();
+
+            AddStep(stepName, () =>
+            {
+                smokeContainers.Clear();
+                SetContents(_ =>
+                {
+                    smokeContainers.Add(new TestSmokeContainer
+                    {
+                        Duration = duration,
+                        RelativeSizeAxes = Axes.Both
+                    });
+
+                    return new SmokingInputManager
+                    {
+                        Duration = duration,
+                        RelativeSizeAxes = Axes.Both,
+                        Size = new Vector2(0.95f),
+                        Child = smokeContainers[^1],
+                    };
+                });
+            });
+
+            AddUntilStep("Until skinnable expires", () =>
+            {
+                if (smokeContainers.Count == 0)
+                    return false;
+
+                Logger.Log("How many: " + smokeContainers.Count);
+
+                foreach (var smokeContainer in smokeContainers)
+                {
+                    if (smokeContainer.Children.Count != 0)
+                        return false;
+                }
+
+                return true;
+            });
+        }
+
+        private class SmokingInputManager : ManualInputManager
+        {
+            public double Duration { get; init; }
+
+            private double? startTime;
+
+            public SmokingInputManager()
+            {
+                UseParentInput = false;
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                MoveMouseTo(ToScreenSpace(DrawSize / 2));
+            }
+
+            protected override void Update()
+            {
+                base.Update();
+
+                const float spin_angle = 4 * MathF.PI;
+
+                startTime ??= Time.Current;
+
+                float fraction = (float)((Time.Current - startTime) / Duration);
+
+                float angle = fraction * spin_angle;
+                float radius = fraction * Math.Min(DrawSize.X, DrawSize.Y) / 2;
+
+                Vector2 pos = radius * new Vector2(MathF.Cos(angle), MathF.Sin(angle)) + DrawSize / 2;
+                MoveMouseTo(ToScreenSpace(pos));
+            }
+        }
+
+        private class TestSmokeContainer : SmokeContainer
+        {
+            public double Duration { get; init; }
+
+            private bool isPressing;
+            private bool isFinished;
+
+            private double? startTime;
+
+            protected override void Update()
+            {
+                base.Update();
+
+                startTime ??= Time.Current + 0.1;
+
+                if (!isPressing && !isFinished && Time.Current > startTime)
+                {
+                    OnPressed(new KeyBindingPressEvent<OsuAction>(new InputState(), OsuAction.Smoke));
+                    isPressing = true;
+                    isFinished = false;
+                }
+
+                if (isPressing && Time.Current > startTime + Duration)
+                {
+                    OnReleased(new KeyBindingReleaseEvent<OsuAction>(new InputState(), OsuAction.Smoke));
+                    isPressing = false;
+                    isFinished = true;
+                }
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/TestSceneSpinnerRotation.cs

@@ -7,7 +7,6 @@ using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio;
-using osu.Framework.Graphics.Sprites;
 using osu.Framework.Testing;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps;
@@ -43,7 +42,6 @@ namespace osu.Game.Rulesets.Osu.Tests
             => new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
 
         private DrawableSpinner drawableSpinner = null!;
-        private SpriteIcon spinnerSymbol => drawableSpinner.ChildrenOfType<SpriteIcon>().Single();
 
         [SetUpSteps]
         public override void SetUpSteps()
@@ -77,7 +75,6 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             double finalCumulativeTrackerRotation = 0;
             double finalTrackerRotation = 0, trackerRotationTolerance = 0;
-            double finalSpinnerSymbolRotation = 0, spinnerSymbolRotationTolerance = 0;
 
             addSeekStep(spinner_start_time + 5000);
             AddStep("retrieve disc rotation", () =>
@@ -85,11 +82,6 @@ namespace osu.Game.Rulesets.Osu.Tests
                 finalTrackerRotation = drawableSpinner.RotationTracker.Rotation;
                 trackerRotationTolerance = Math.Abs(finalTrackerRotation * 0.05f);
             });
-            AddStep("retrieve spinner symbol rotation", () =>
-            {
-                finalSpinnerSymbolRotation = spinnerSymbol.Rotation;
-                spinnerSymbolRotationTolerance = Math.Abs(finalSpinnerSymbolRotation * 0.05f);
-            });
             AddStep("retrieve cumulative disc rotation", () => finalCumulativeTrackerRotation = drawableSpinner.Result.RateAdjustedRotation);
 
             addSeekStep(spinner_start_time + 2500);
@@ -98,8 +90,6 @@ namespace osu.Game.Rulesets.Osu.Tests
                 // due to the exponential damping applied we're allowing a larger margin of error of about 10%
                 // (5% relative to the final rotation value, but we're half-way through the spin).
                 () => drawableSpinner.RotationTracker.Rotation, () => Is.EqualTo(finalTrackerRotation / 2).Within(trackerRotationTolerance));
-            AddAssert("symbol rotation rewound",
-                () => spinnerSymbol.Rotation, () => Is.EqualTo(finalSpinnerSymbolRotation / 2).Within(spinnerSymbolRotationTolerance));
             AddAssert("is cumulative rotation rewound",
                 // cumulative rotation is not damped, so we're treating it as the "ground truth" and allowing a comparatively smaller margin of error.
                 () => drawableSpinner.Result.RateAdjustedRotation, () => Is.EqualTo(finalCumulativeTrackerRotation / 2).Within(100));
@@ -107,8 +97,6 @@ namespace osu.Game.Rulesets.Osu.Tests
             addSeekStep(spinner_start_time + 5000);
             AddAssert("is disc rotation almost same",
                 () => drawableSpinner.RotationTracker.Rotation, () => Is.EqualTo(finalTrackerRotation).Within(trackerRotationTolerance));
-            AddAssert("is symbol rotation almost same",
-                () => spinnerSymbol.Rotation, () => Is.EqualTo(finalSpinnerSymbolRotation).Within(spinnerSymbolRotationTolerance));
             AddAssert("is cumulative rotation almost same",
                 () => drawableSpinner.Result.RateAdjustedRotation, () => Is.EqualTo(finalCumulativeTrackerRotation).Within(100));
         }
@@ -122,7 +110,6 @@ namespace osu.Game.Rulesets.Osu.Tests
             addSeekStep(5000);
 
             AddAssert("disc spin direction correct", () => clockwise ? drawableSpinner.RotationTracker.Rotation > 0 : drawableSpinner.RotationTracker.Rotation < 0);
-            AddAssert("spinner symbol direction correct", () => clockwise ? spinnerSymbol.Rotation > 0 : spinnerSymbol.Rotation < 0);
         }
 
         private Replay flip(Replay scoreReplay) => new Replay

osu.Game.Rulesets.Osu.Tests/TestSceneTrianglesSpinnerRotation.cs

@@ -0,0 +1,149 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Audio;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Testing;
+using osu.Framework.Timing;
+using osu.Game.Beatmaps;
+using osu.Game.Database;
+using osu.Game.Replays;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Replays;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Rulesets.Replays;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
+using osu.Game.Skinning;
+using osu.Game.Storyboards;
+using osu.Game.Tests.Visual;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneTrianglesSpinnerRotation : TestSceneOsuPlayer
+    {
+        private const double spinner_start_time = 100;
+        private const double spinner_duration = 6000;
+
+        [Resolved]
+        private SkinManager skinManager { get; set; } = null!;
+
+        [Resolved]
+        private AudioManager audioManager { get; set; } = null!;
+
+        protected override bool Autoplay => true;
+
+        protected override TestPlayer CreatePlayer(Ruleset ruleset) => new ScoreExposedPlayer();
+
+        protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard? storyboard = null)
+            => new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
+
+        private DrawableSpinner drawableSpinner = null!;
+        private SpriteIcon spinnerSymbol => drawableSpinner.ChildrenOfType<SpriteIcon>().Single();
+
+        [SetUpSteps]
+        public override void SetUpSteps()
+        {
+            base.SetUpSteps();
+
+            AddStep("set triangles skin", () => skinManager.CurrentSkinInfo.Value = TrianglesSkin.CreateInfo().ToLiveUnmanaged());
+
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
+            AddStep("retrieve spinner", () => drawableSpinner = (DrawableSpinner)Player.DrawableRuleset.Playfield.AllHitObjects.First());
+        }
+
+        [Test]
+        public void TestSymbolMiddleRewindingRotation()
+        {
+            double finalSpinnerSymbolRotation = 0, spinnerSymbolRotationTolerance = 0;
+
+            addSeekStep(spinner_start_time + 5000);
+            AddStep("retrieve spinner symbol rotation", () =>
+            {
+                finalSpinnerSymbolRotation = spinnerSymbol.Rotation;
+                spinnerSymbolRotationTolerance = Math.Abs(finalSpinnerSymbolRotation * 0.05f);
+            });
+
+            addSeekStep(spinner_start_time + 2500);
+            AddAssert("symbol rotation rewound",
+                () => spinnerSymbol.Rotation, () => Is.EqualTo(finalSpinnerSymbolRotation / 2).Within(spinnerSymbolRotationTolerance));
+
+            addSeekStep(spinner_start_time + 5000);
+            AddAssert("is symbol rotation almost same",
+                () => spinnerSymbol.Rotation, () => Is.EqualTo(finalSpinnerSymbolRotation).Within(spinnerSymbolRotationTolerance));
+        }
+
+        [Test]
+        public void TestSymbolRotationDirection([Values(true, false)] bool clockwise)
+        {
+            if (clockwise)
+                transformReplay(flip);
+
+            addSeekStep(5000);
+            AddAssert("spinner symbol direction correct", () => clockwise ? spinnerSymbol.Rotation > 0 : spinnerSymbol.Rotation < 0);
+        }
+
+        private Replay flip(Replay scoreReplay) => new Replay
+        {
+            Frames = scoreReplay
+                     .Frames
+                     .Cast<OsuReplayFrame>()
+                     .Select(replayFrame =>
+                     {
+                         var flippedPosition = new Vector2(OsuPlayfield.BASE_SIZE.X - replayFrame.Position.X, replayFrame.Position.Y);
+                         return new OsuReplayFrame(replayFrame.Time, flippedPosition, replayFrame.Actions.ToArray());
+                     })
+                     .Cast<ReplayFrame>()
+                     .ToList()
+        };
+
+        private void addSeekStep(double time)
+        {
+            AddStep($"seek to {time}", () => Player.GameplayClockContainer.Seek(time));
+            AddUntilStep("wait for seek to finish", () => Player.DrawableRuleset.FrameStableClock.CurrentTime, () => Is.EqualTo(time).Within(100));
+        }
+
+        private void transformReplay(Func<Replay, Replay> replayTransformation) => AddStep("set replay", () =>
+        {
+            var drawableRuleset = this.ChildrenOfType<DrawableOsuRuleset>().Single();
+            var score = drawableRuleset.ReplayScore;
+            var transformedScore = new Score
+            {
+                ScoreInfo = score.ScoreInfo,
+                Replay = replayTransformation.Invoke(score.Replay)
+            };
+            drawableRuleset.SetReplayScore(transformedScore);
+        });
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new Beatmap
+        {
+            HitObjects = new List<HitObject>
+            {
+                new Spinner
+                {
+                    Position = new Vector2(256, 192),
+                    StartTime = spinner_start_time,
+                    Duration = spinner_duration
+                },
+            }
+        };
+
+        private class ScoreExposedPlayer : TestPlayer
+        {
+            public new ScoreProcessor ScoreProcessor => base.ScoreProcessor;
+
+            public ScoreExposedPlayer()
+                : base(false, false)
+            {
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/osu.Game.Rulesets.Osu.Tests.csproj

@@ -1,11 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
     <PackageReference Include="Moq" Version="4.18.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
-    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>

osu.Game.Rulesets.Osu/Difficulty/Evaluators/FlashlightEvaluator.cs

@@ -56,7 +56,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
 
                 if (!(currentObj.BaseObject is Spinner))
                 {
-                    double jumpDistance = (osuHitObject.StackedPosition - currentHitObject.EndPosition).Length;
+                    double jumpDistance = (osuHitObject.StackedPosition - currentHitObject.StackedEndPosition).Length;
 
                     cumulativeStrainTime += lastObj.StrainTime;
 

osu.Game.Rulesets.Osu/Difficulty/Evaluators/RhythmEvaluator.cs

@@ -18,7 +18,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
         /// <summary>
         /// Calculates a rhythm multiplier for the difficulty of the tap associated with historic data of the current <see cref="OsuDifficultyHitObject"/>.
         /// </summary>
-        public static double EvaluateDifficultyOf(DifficultyHitObject current, double greatWindow)
+        public static double EvaluateDifficultyOf(DifficultyHitObject current)
         {
             if (current.BaseObject is Spinner)
                 return 0;
@@ -53,7 +53,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
                 double lastDelta = lastObj.StrainTime;
                 double currRatio = 1.0 + 6.0 * Math.Min(0.5, Math.Pow(Math.Sin(Math.PI / (Math.Min(prevDelta, currDelta) / Math.Max(prevDelta, currDelta))), 2)); // fancy function to calculate rhythmbonuses.
 
-                double windowPenalty = Math.Min(1, Math.Max(0, Math.Abs(prevDelta - currDelta) - greatWindow * 0.6) / (greatWindow * 0.6));
+                double windowPenalty = Math.Min(1, Math.Max(0, Math.Abs(prevDelta - currDelta) - currObj.HitWindowGreat * 0.3) / (currObj.HitWindowGreat * 0.3));
 
                 windowPenalty = Math.Min(1, windowPenalty);
 

osu.Game.Rulesets.Osu/Difficulty/Evaluators/SpeedEvaluator.cs

@@ -24,7 +24,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
         /// <item><description>and how easily they can be cheesed.</description></item>
         /// </list>
         /// </summary>
-        public static double EvaluateDifficultyOf(DifficultyHitObject current, double greatWindow)
+        public static double EvaluateDifficultyOf(DifficultyHitObject current)
         {
             if (current.BaseObject is Spinner)
                 return 0;
@@ -35,7 +35,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
             var osuNextObj = (OsuDifficultyHitObject)current.Next(0);
 
             double strainTime = osuCurrObj.StrainTime;
-            double greatWindowFull = greatWindow * 2;
             double doubletapness = 1;
 
             // Nerf doubletappable doubles.
@@ -45,13 +44,13 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Evaluators
                 double nextDeltaTime = Math.Max(1, osuNextObj.DeltaTime);
                 double deltaDifference = Math.Abs(nextDeltaTime - currDeltaTime);
                 double speedRatio = currDeltaTime / Math.Max(currDeltaTime, deltaDifference);
-                double windowRatio = Math.Pow(Math.Min(1, currDeltaTime / greatWindowFull), 2);
+                double windowRatio = Math.Pow(Math.Min(1, currDeltaTime / osuCurrObj.HitWindowGreat), 2);
                 doubletapness = Math.Pow(speedRatio, 1 - windowRatio);
             }
 
             // Cap deltatime to the OD 300 hitwindow.
             // 0.93 is derived from making sure 260bpm OD8 streams aren't nerfed harshly, whilst 0.92 limits the effect of the cap.
-            strainTime /= Math.Clamp((strainTime / greatWindowFull) / 0.93, 0.92, 1);
+            strainTime /= Math.Clamp((strainTime / osuCurrObj.HitWindowGreat) / 0.93, 0.92, 1);
 
             // derive speedBonus for calculation
             double speedBonus = 1.0;

osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs

@@ -23,7 +23,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty
     public class OsuDifficultyCalculator : DifficultyCalculator
     {
         private const double difficulty_multiplier = 0.0675;
-        private double hitWindowGreat;
 
         public override int Version => 20220902;
 
@@ -45,6 +44,12 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 
             double sliderFactor = aimRating > 0 ? aimRatingNoSliders / aimRating : 1;
 
+            if (mods.Any(m => m is OsuModTouchDevice))
+            {
+                aimRating = Math.Pow(aimRating, 0.8);
+                flashlightRating = Math.Pow(flashlightRating, 0.8);
+            }
+
             if (mods.Any(h => h is OsuModRelax))
             {
                 aimRating *= 0.9;
@@ -76,6 +81,11 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             int sliderCount = beatmap.HitObjects.Count(h => h is Slider);
             int spinnerCount = beatmap.HitObjects.Count(h => h is Spinner);
 
+            HitWindows hitWindows = new OsuHitWindows();
+            hitWindows.SetDifficulty(beatmap.Difficulty.OverallDifficulty);
+
+            double hitWindowGreat = hitWindows.WindowFor(HitResult.Great) / clockRate;
+
             return new OsuDifficultyAttributes
             {
                 StarRating = starRating,
@@ -112,22 +122,18 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 
         protected override Skill[] CreateSkills(IBeatmap beatmap, Mod[] mods, double clockRate)
         {
-            HitWindows hitWindows = new OsuHitWindows();
-            hitWindows.SetDifficulty(beatmap.Difficulty.OverallDifficulty);
-
-            hitWindowGreat = hitWindows.WindowFor(HitResult.Great) / clockRate;
-
             return new Skill[]
             {
                 new Aim(mods, true),
                 new Aim(mods, false),
-                new Speed(mods, hitWindowGreat),
+                new Speed(mods),
                 new Flashlight(mods)
             };
         }
 
         protected override Mod[] DifficultyAdjustmentMods => new Mod[]
         {
+            new OsuModTouchDevice(),
             new OsuModDoubleTime(),
             new OsuModHalfTime(),
             new OsuModEasy(),

osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs

@@ -88,12 +88,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
 
         private double computeAimValue(ScoreInfo score, OsuDifficultyAttributes attributes)
         {
-            double rawAim = attributes.AimDifficulty;
-
-            if (score.Mods.Any(m => m is OsuModTouchDevice))
-                rawAim = Math.Pow(rawAim, 0.8);
-
-            double aimValue = Math.Pow(5.0 * Math.Max(1.0, rawAim / 0.0675) - 4.0, 3.0) / 100000.0;
+            double aimValue = Math.Pow(5.0 * Math.Max(1.0, attributes.AimDifficulty / 0.0675) - 4.0, 3.0) / 100000.0;
 
             double lengthBonus = 0.95 + 0.4 * Math.Min(1.0, totalHits / 2000.0) +
                                  (totalHits > 2000 ? Math.Log10(totalHits / 2000.0) * 0.5 : 0.0);
@@ -233,12 +228,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             if (!score.Mods.Any(h => h is OsuModFlashlight))
                 return 0.0;
 
-            double rawFlashlight = attributes.FlashlightDifficulty;
-
-            if (score.Mods.Any(m => m is OsuModTouchDevice))
-                rawFlashlight = Math.Pow(rawFlashlight, 0.8);
-
-            double flashlightValue = Math.Pow(rawFlashlight, 2.0) * 25.0;
+            double flashlightValue = Math.Pow(attributes.FlashlightDifficulty, 2.0) * 25.0;
 
             // Penalize misses by assessing # of misses relative to the total # of objects. Default a 3% reduction for any # of misses.
             if (effectiveMissCount > 0)

osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs

@@ -9,6 +9,7 @@ using osu.Game.Rulesets.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Scoring;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
@@ -78,6 +79,11 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
         /// </summary>
         public double? Angle { get; private set; }
 
+        /// <summary>
+        /// Retrieves the full hit window for a Great <see cref="HitResult"/>.
+        /// </summary>
+        public double HitWindowGreat { get; private set; }
+
         private readonly OsuHitObject lastLastObject;
         private readonly OsuHitObject lastObject;
 
@@ -90,6 +96,15 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
             // Capped to 25ms to prevent difficulty calculation breaking from simultaneous objects.
             StrainTime = Math.Max(DeltaTime, min_delta_time);
 
+            if (BaseObject is Slider sliderObject)
+            {
+                HitWindowGreat = 2 * sliderObject.HeadCircle.HitWindows.WindowFor(HitResult.Great) / clockRate;
+            }
+            else
+            {
+                HitWindowGreat = 2 * BaseObject.HitWindows.WindowFor(HitResult.Great) / clockRate;
+            }
+
             setDistances(clockRate);
         }
 

osu.Game.Rulesets.Osu/Difficulty/Skills/Speed.cs

@@ -26,14 +26,12 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
 
         protected override int ReducedSectionCount => 5;
         protected override double DifficultyMultiplier => 1.04;
-        private readonly double greatWindow;
 
         private readonly List<double> objectStrains = new List<double>();
 
-        public Speed(Mod[] mods, double hitWindowGreat)
+        public Speed(Mod[] mods)
             : base(mods)
         {
-            greatWindow = hitWindowGreat;
         }
 
         private double strainDecay(double ms) => Math.Pow(strainDecayBase, ms / 1000);
@@ -43,9 +41,9 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Skills
         protected override double StrainValueAt(DifficultyHitObject current)
         {
             currentStrain *= strainDecay(((OsuDifficultyHitObject)current).StrainTime);
-            currentStrain += SpeedEvaluator.EvaluateDifficultyOf(current, greatWindow) * skillMultiplier;
+            currentStrain += SpeedEvaluator.EvaluateDifficultyOf(current) * skillMultiplier;
 
-            currentRhythm = RhythmEvaluator.EvaluateDifficultyOf(current, greatWindow);
+            currentRhythm = RhythmEvaluator.EvaluateDifficultyOf(current);
 
             double totalStrain = currentStrain * currentRhythm;
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointPiece.cs

@@ -6,6 +6,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
@@ -53,6 +54,9 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         private IBindable<Vector2> sliderPosition;
         private IBindable<float> sliderScale;
 
+        [UsedImplicitly]
+        private readonly IBindable<int> sliderVersion;
+
         public PathControlPointPiece(Slider slider, PathControlPoint controlPoint)
         {
             this.slider = slider;
@@ -61,11 +65,15 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             // we don't want to run the path type update on construction as it may inadvertently change the slider.
             cachePoints(slider);
 
-            slider.Path.Version.BindValueChanged(_ =>
+            sliderVersion = slider.Path.Version.GetBoundCopy();
+
+            // schedule ensure that updates are only applied after all operations from a single frame are applied.
+            // this avoids inadvertently changing the slider path type for batch operations.
+            sliderVersion.BindValueChanged(_ => Scheduler.AddOnce(() =>
             {
                 cachePoints(slider);
                 updatePathType();
-            });
+            }));
 
             controlPoint.Changed += updateMarkerDisplay;
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs

@@ -303,11 +303,15 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             }
             else
             {
+                var result = snapProvider?.FindSnappedPositionAndTime(Parent.ToScreenSpace(e.MousePosition));
+
+                Vector2 movementDelta = Parent.ToLocalSpace(result?.ScreenSpacePosition ?? Parent.ToScreenSpace(e.MousePosition)) - dragStartPositions[draggedControlPointIndex] - slider.Position;
+
                 for (int i = 0; i < controlPoints.Count; ++i)
                 {
                     var controlPoint = controlPoints[i];
                     if (selectedControlPoints.Contains(controlPoint))
-                        controlPoint.Position = dragStartPositions[i] + (e.MousePosition - e.MouseDownPosition);
+                        controlPoint.Position = dragStartPositions[i] + movementDelta;
                 }
             }
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPlacementBlueprint.cs

@@ -198,7 +198,8 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 }
 
                 // Update the cursor position.
-                cursor.Position = ToLocalSpace(inputManager.CurrentState.Mouse.Position) - HitObject.Position;
+                var result = snapProvider?.FindSnappedPositionAndTime(inputManager.CurrentState.Mouse.Position);
+                cursor.Position = ToLocalSpace(result?.ScreenSpacePosition ?? inputManager.CurrentState.Mouse.Position) - HitObject.Position;
             }
             else if (cursor != null)
             {

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs

@@ -163,7 +163,10 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         protected override void OnDrag(DragEvent e)
         {
             if (placementControlPoint != null)
-                placementControlPoint.Position = e.MousePosition - HitObject.Position;
+            {
+                var result = snapProvider?.FindSnappedPositionAndTime(ToScreenSpace(e.MousePosition));
+                placementControlPoint.Position = ToLocalSpace(result?.ScreenSpacePosition ?? ToScreenSpace(e.MousePosition)) - HitObject.Position;
+            }
         }
 
         protected override void OnMouseUp(MouseUpEvent e)

osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs

@@ -127,16 +127,13 @@ namespace osu.Game.Rulesets.Osu.Edit
                 {
                     didFlip = true;
 
-                    var controlPoints = slider.Path.ControlPoints.Select(p =>
-                        new PathControlPoint(new Vector2(
-                            (direction == Direction.Horizontal ? -1 : 1) * p.Position.X,
-                            (direction == Direction.Vertical ? -1 : 1) * p.Position.Y
-                        ), p.Type)).ToArray();
-
-                    // Importantly, update as a single operation so automatic adjustment of control points to different
-                    // curve types does not unexpectedly trigger and change the slider's shape.
-                    slider.Path.ControlPoints.Clear();
-                    slider.Path.ControlPoints.AddRange(controlPoints);
+                    foreach (var cp in slider.Path.ControlPoints)
+                    {
+                        cp.Position = new Vector2(
+                            (direction == Direction.Horizontal ? -1 : 1) * cp.Position.X,
+                            (direction == Direction.Vertical ? -1 : 1) * cp.Position.Y
+                        );
+                    }
                 }
             }
 
@@ -186,13 +183,8 @@ namespace osu.Game.Rulesets.Osu.Edit
 
                 if (h is IHasPath path)
                 {
-                    var controlPoints = path.Path.ControlPoints.Select(p =>
-                        new PathControlPoint(RotatePointAroundOrigin(p.Position, Vector2.Zero, delta), p.Type)).ToArray();
-
-                    // Importantly, update as a single operation so automatic adjustment of control points to different
-                    // curve types does not unexpectedly trigger and change the slider's shape.
-                    path.Path.ControlPoints.Clear();
-                    path.Path.ControlPoints.AddRange(controlPoints);
+                    foreach (PathControlPoint cp in path.Path.ControlPoints)
+                        cp.Position = RotatePointAroundOrigin(cp.Position, Vector2.Zero, delta);
                 }
             }
 

osu.Game.Rulesets.Osu/Mods/InputBlockingMod.cs

@@ -18,7 +18,7 @@ using osu.Game.Utils;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
-    public abstract class InputBlockingMod : Mod, IApplicableToDrawableRuleset<OsuHitObject>
+    public abstract class InputBlockingMod : Mod, IApplicableToDrawableRuleset<OsuHitObject>, IUpdatableByPlayfield
     {
         public override double ScoreMultiplier => 1.0;
         public override Type[] IncompatibleMods => new[] { typeof(ModAutoplay), typeof(ModRelax), typeof(OsuModCinema) };
@@ -62,15 +62,18 @@ namespace osu.Game.Rulesets.Osu.Mods
             gameplayClock = drawableRuleset.FrameStableClock;
         }
 
+        public void Update(Playfield playfield)
+        {
+            if (LastAcceptedAction != null && nonGameplayPeriods.IsInAny(gameplayClock.CurrentTime))
+                LastAcceptedAction = null;
+        }
+
         protected abstract bool CheckValidNewAction(OsuAction action);
 
         private bool checkCorrectAction(OsuAction action)
         {
             if (nonGameplayPeriods.IsInAny(gameplayClock.CurrentTime))
-            {
-                LastAcceptedAction = null;
                 return true;
-            }
 
             switch (action)
             {

osu.Game.Rulesets.Osu/Mods/OsuModDeflate.cs

@@ -4,7 +4,6 @@
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Localisation;
-using osu.Game.Configuration;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
@@ -18,13 +17,10 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         public override LocalisableString Description => "Hit them at the right size!";
 
-        [SettingSource("Starting Size", "The initial size multiplier applied to all objects.")]
-        public override BindableNumber<float> StartScale { get; } = new BindableFloat
+        public override BindableNumber<float> StartScale { get; } = new BindableFloat(2)
         {
             MinValue = 1f,
             MaxValue = 25f,
-            Default = 2f,
-            Value = 2f,
             Precision = 0.1f,
         };
     }

osu.Game.Rulesets.Osu/Mods/OsuModFlashlight.cs

@@ -32,24 +32,16 @@ namespace osu.Game.Rulesets.Osu.Mods
             Precision = default_follow_delay,
         };
 
-        [SettingSource("Flashlight size", "Multiplier applied to the default flashlight size.")]
-        public override BindableFloat SizeMultiplier { get; } = new BindableFloat
+        public override BindableFloat SizeMultiplier { get; } = new BindableFloat(1)
         {
             MinValue = 0.5f,
             MaxValue = 2f,
-            Default = 1f,
-            Value = 1f,
             Precision = 0.1f
         };
 
-        [SettingSource("Change size based on combo", "Decrease the flashlight size as combo increases.")]
-        public override BindableBool ComboBasedSize { get; } = new BindableBool
-        {
-            Default = true,
-            Value = true
-        };
+        public override BindableBool ComboBasedSize { get; } = new BindableBool(true);
 
-        public override float DefaultFlashlightSize => 180;
+        public override float DefaultFlashlightSize => 200;
 
         private OsuFlashlight flashlight = null!;
 
@@ -71,6 +63,7 @@ namespace osu.Game.Rulesets.Osu.Mods
                 followDelay = modFlashlight.FollowDelay.Value;
 
                 FlashlightSize = new Vector2(0, GetSizeFor(0));
+                FlashlightSmoothness = 1.4f;
             }
 
             public void OnSliderTrackingChange(ValueChangedEvent<bool> e)

osu.Game.Rulesets.Osu/Mods/OsuModGrow.cs

@@ -4,7 +4,6 @@
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Localisation;
-using osu.Game.Configuration;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
@@ -18,13 +17,10 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         public override LocalisableString Description => "Hit them at the right size!";
 
-        [SettingSource("Starting Size", "The initial size multiplier applied to all objects.")]
-        public override BindableNumber<float> StartScale { get; } = new BindableFloat
+        public override BindableNumber<float> StartScale { get; } = new BindableFloat(0.5f)
         {
             MinValue = 0f,
             MaxValue = 0.99f,
-            Default = 0.5f,
-            Value = 0.5f,
             Precision = 0.01f,
         };
     }

osu.Game.Rulesets.Osu/Mods/OsuModNoScope.cs

@@ -7,8 +7,6 @@ using osu.Framework.Bindables;
 using osu.Framework.Localisation;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
-using osu.Game.Configuration;
-using osu.Game.Overlays.Settings;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.UI;
@@ -22,15 +20,8 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         private PeriodTracker spinnerPeriods = null!;
 
-        [SettingSource(
-            "Hidden at combo",
-            "The combo count at which the cursor becomes completely hidden",
-            SettingControlType = typeof(SettingsSlider<int, HiddenComboSlider>)
-        )]
-        public override BindableInt HiddenComboCount { get; } = new BindableInt
+        public override BindableInt HiddenComboCount { get; } = new BindableInt(10)
         {
-            Default = 10,
-            Value = 10,
             MinValue = 0,
             MaxValue = 50,
         };

osu.Game.Rulesets.Osu/Mods/OsuModObjectScaleTween.cs

@@ -4,6 +4,7 @@
 using System;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Game.Configuration;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects;
@@ -20,6 +21,7 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         public override double ScoreMultiplier => 1;
 
+        [SettingSource("Starting Size", "The initial size multiplier applied to all objects.")]
         public abstract BindableNumber<float> StartScale { get; }
 
         protected virtual float EndScale => 1;

osu.Game.Rulesets.Osu/Mods/OsuModRandom.cs

@@ -4,9 +4,12 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using osu.Framework.Bindables;
 using osu.Framework.Localisation;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
+using osu.Game.Configuration;
+using osu.Game.Overlays.Settings;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu.Beatmaps;
@@ -25,6 +28,14 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         public override Type[] IncompatibleMods => base.IncompatibleMods.Append(typeof(OsuModTarget)).ToArray();
 
+        [SettingSource("Angle sharpness", "How sharp angles should be", SettingControlType = typeof(SettingsSlider<float>))]
+        public BindableFloat AngleSharpness { get; } = new BindableFloat(7)
+        {
+            MinValue = 1,
+            MaxValue = 10,
+            Precision = 0.1f
+        };
+
         private static readonly float playfield_diagonal = OsuPlayfield.BASE_SIZE.LengthFast;
 
         private Random random = null!;
@@ -50,7 +61,7 @@ namespace osu.Game.Rulesets.Osu.Mods
             {
                 if (shouldStartNewSection(osuBeatmap, positionInfos, i))
                 {
-                    sectionOffset = OsuHitObjectGenerationUtils.RandomGaussian(random, 0, 0.0008f);
+                    sectionOffset = getRandomOffset(0.0008f);
                     flowDirection = !flowDirection;
                 }
 
@@ -65,11 +76,11 @@ namespace osu.Game.Rulesets.Osu.Mods
                     float flowChangeOffset = 0;
 
                     // Offsets only the angle of the current hit object.
-                    float oneTimeOffset = OsuHitObjectGenerationUtils.RandomGaussian(random, 0, 0.002f);
+                    float oneTimeOffset = getRandomOffset(0.002f);
 
                     if (shouldApplyFlowChange(positionInfos, i))
                     {
-                        flowChangeOffset = OsuHitObjectGenerationUtils.RandomGaussian(random, 0, 0.002f);
+                        flowChangeOffset = getRandomOffset(0.002f);
                         flowDirection = !flowDirection;
                     }
 
@@ -86,13 +97,36 @@ namespace osu.Game.Rulesets.Osu.Mods
             osuBeatmap.HitObjects = OsuHitObjectGenerationUtils.RepositionHitObjects(positionInfos);
         }
 
+        private float getRandomOffset(float stdDev)
+        {
+            // Range: [0.5, 2]
+            // Higher angle sharpness -> lower multiplier
+            float customMultiplier = (1.5f * AngleSharpness.MaxValue - AngleSharpness.Value) / (1.5f * AngleSharpness.MaxValue - AngleSharpness.Default);
+
+            return OsuHitObjectGenerationUtils.RandomGaussian(random, 0, stdDev * customMultiplier);
+        }
+
         /// <param name="targetDistance">The target distance between the previous and the current <see cref="OsuHitObject"/>.</param>
         /// <param name="offset">The angle (in rad) by which the target angle should be offset.</param>
         /// <param name="flowDirection">Whether the relative angle should be positive or negative.</param>
-        private static float getRelativeTargetAngle(float targetDistance, float offset, bool flowDirection)
+        private float getRelativeTargetAngle(float targetDistance, float offset, bool flowDirection)
         {
-            float angle = (float)(2.16 / (1 + 200 * Math.Exp(0.036 * (targetDistance - 310))) + 0.5 + offset);
+            // Range: [0.1, 1]
+            float angleSharpness = AngleSharpness.Value / AngleSharpness.MaxValue;
+            // Range: [0, 0.9]
+            float angleWideness = 1 - angleSharpness;
+
+            // Range: [-60, 30]
+            float customOffsetX = angleSharpness * 100 - 70;
+            // Range: [-0.075, 0.15]
+            float customOffsetY = angleWideness * 0.25f - 0.075f;
+
+            targetDistance += customOffsetX;
+            float angle = (float)(2.16 / (1 + 200 * Math.Exp(0.036 * (targetDistance - 310 + customOffsetX))) + 0.5);
+            angle += offset + customOffsetY;
+
             float relativeAngle = (float)Math.PI - angle;
+
             return flowDirection ? -relativeAngle : relativeAngle;
         }
 

osu.Game.Rulesets.Osu/Mods/OsuModTarget.cs

@@ -53,11 +53,7 @@ namespace osu.Game.Rulesets.Osu.Mods
         }).ToArray();
 
         [SettingSource("Seed", "Use a custom seed instead of a random one", SettingControlType = typeof(SettingsNumberBox))]
-        public Bindable<int?> Seed { get; } = new Bindable<int?>
-        {
-            Default = null,
-            Value = null
-        };
+        public Bindable<int?> Seed { get; } = new Bindable<int?>();
 
         [SettingSource("Metronome ticks", "Whether a metronome beat should play in the background")]
         public Bindable<bool> Metronome { get; } = new BindableBool(true);

osu.Game.Rulesets.Osu/Objects/Drawables/Connections/FollowPointConnection.cs

@@ -1,9 +1,8 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System;
+using System.Diagnostics;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Pooling;
 using osu.Game.Rulesets.Objects;
@@ -21,32 +20,36 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Connections
         public const int SPACING = 32;
         public const double PREEMPT = 800;
 
-        public DrawablePool<FollowPoint> Pool;
+        public DrawablePool<FollowPoint>? Pool { private get; set; }
 
         protected override void OnApply(FollowPointLifetimeEntry entry)
         {
             base.OnApply(entry);
 
-            entry.Invalidated += onEntryInvalidated;
-            refreshPoints();
+            entry.Invalidated += scheduleRefresh;
+
+            // Our clock may not be correct at this point if `LoadComplete` has not run yet.
+            // Without a schedule, animations referencing FollowPoint's clock (see `IAnimationTimeReference`) would be incorrect on first pool usage.
+            scheduleRefresh();
         }
 
         protected override void OnFree(FollowPointLifetimeEntry entry)
         {
             base.OnFree(entry);
 
-            entry.Invalidated -= onEntryInvalidated;
+            entry.Invalidated -= scheduleRefresh;
             // Return points to the pool.
             ClearInternal(false);
         }
 
-        private void onEntryInvalidated() => Scheduler.AddOnce(refreshPoints);
-
-        private void refreshPoints()
+        private void scheduleRefresh() => Scheduler.AddOnce(() =>
         {
+            Debug.Assert(Pool != null);
+
             ClearInternal(false);
 
             var entry = Entry;
+
             if (entry?.End == null) return;
 
             OsuHitObject start = entry.Start;
@@ -95,7 +98,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Connections
             }
 
             entry.LifetimeEnd = finalTransformEndTime;
-        }
+        });
 
         /// <summary>
         /// Computes the fade time of follow point positioned between two hitobjects.

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableHitCircle.cs

@@ -12,6 +12,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Input;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
+using osu.Game.Graphics.Containers;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Judgements;
@@ -47,12 +48,14 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         {
         }
 
+        private ShakeContainer shakeContainer;
+
         [BackgroundDependencyLoader]
         private void load()
         {
             Origin = Anchor.Centre;
 
-            InternalChildren = new Drawable[]
+            AddRangeInternal(new Drawable[]
             {
                 scaleContainer = new Container
                 {
@@ -72,6 +75,12 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                                 return true;
                             },
                         },
+                        shakeContainer = new ShakeContainer
+                        {
+                            ShakeDuration = 30,
+                            RelativeSizeAxes = Axes.Both,
+                            Children = new Drawable[]
+                            {
                                 CirclePiece = new SkinnableDrawable(new OsuSkinComponent(CirclePieceComponent), _ => new MainCirclePiece())
                                 {
                                     Anchor = Anchor.Centre,
@@ -86,8 +95,10 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                                     Scale = new Vector2(4),
                                 }
                             }
+                        }
+                    }
                 },
-            };
+            });
 
             Size = HitArea.DrawSize;
 
@@ -123,6 +134,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             }
         }
 
+        public override void Shake() => shakeContainer.Shake();
+
         protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
             Debug.Assert(HitObject.HitWindows != null);
@@ -139,7 +152,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             if (result == HitResult.None || CheckHittable?.Invoke(this, Time.Current) == false)
             {
-                Shake(Math.Abs(timeOffset) - HitObject.HitWindows.WindowFor(HitResult.Miss));
+                Shake();
                 return;
             }
 
@@ -191,12 +204,12 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             // todo: temporary / arbitrary, used for lifetime optimisation.
             this.Delay(800).FadeOut();
 
-            // in the case of an early state change, the fade should be expedited to the current point in time.
-            if (HitStateUpdateTime < HitObject.StartTime)
-                ApproachCircle.FadeOut(50);
-
             switch (state)
             {
+                default:
+                    ApproachCircle.FadeOut();
+                    break;
+
                 case ArmedState.Idle:
                     HitArea.HitAction = null;
                     break;

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableOsuHitObject.cs

@@ -6,17 +6,18 @@
 using System;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
-using osu.Game.Rulesets.Objects.Drawables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Judgements;
-using osu.Game.Graphics.Containers;
+using osu.Game.Rulesets.Osu.Scoring;
 using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
-    public class DrawableOsuHitObject : DrawableHitObject<OsuHitObject>
+    public abstract class DrawableOsuHitObject : DrawableHitObject<OsuHitObject>
     {
         public readonly IBindable<Vector2> PositionBindable = new Bindable<Vector2>();
         public readonly IBindable<int> StackHeightBindable = new Bindable<int>();
@@ -34,8 +35,6 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         /// </summary>
         public Func<DrawableHitObject, double, bool> CheckHittable;
 
-        private ShakeContainer shakeContainer;
-
         protected DrawableOsuHitObject(OsuHitObject hitObject)
             : base(hitObject)
         {
@@ -45,12 +44,6 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         private void load()
         {
             Alpha = 0;
-
-            base.AddInternal(shakeContainer = new ShakeContainer
-            {
-                ShakeDuration = 30,
-                RelativeSizeAxes = Axes.Both
-            });
         }
 
         protected override void OnApply()
@@ -73,18 +66,32 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             ScaleBindable.UnbindFrom(HitObject.ScaleBindable);
         }
 
-        // Forward all internal management to shakeContainer.
-        // This is a bit ugly but we don't have the concept of InternalContent so it'll have to do for now. (https://github.com/ppy/osu-framework/issues/1690)
-        protected override void AddInternal(Drawable drawable) => shakeContainer.Add(drawable);
-        protected override void ClearInternal(bool disposeChildren = true) => shakeContainer.Clear(disposeChildren);
-        protected override bool RemoveInternal(Drawable drawable, bool disposeImmediately) => shakeContainer.Remove(drawable, disposeImmediately);
+        protected override void UpdateInitialTransforms()
+        {
+            base.UpdateInitialTransforms();
+
+            // Dim should only be applied at a top level, as it will be implicitly applied to nested objects.
+            if (ParentHitObject == null)
+            {
+                // Of note, no one noticed this was missing for years, but it definitely feels like it should still exist.
+                // For now this is applied across all skins, and matches stable.
+                // For simplicity, dim colour is applied to the DrawableHitObject itself.
+                // We may need to make a nested container setup if this even causes a usage conflict (ie. with a mod).
+                this.FadeColour(new Color4(195, 195, 195, 255));
+                using (BeginDelayedSequence(InitialLifetimeOffset - OsuHitWindows.MISS_WINDOW))
+                    this.FadeColour(Color4.White, 100);
+            }
+        }
 
         protected sealed override double InitialLifetimeOffset => HitObject.TimePreempt;
 
         private OsuInputManager osuActionInputManager;
         internal OsuInputManager OsuActionInputManager => osuActionInputManager ??= GetContainingInputManager() as OsuInputManager;
 
-        public virtual void Shake(double maximumLength) => shakeContainer.Shake(maximumLength);
+        /// <summary>
+        /// Shake the hit object in case it was clicked far too early or late (aka "note lock").
+        /// </summary>
+        public virtual void Shake() { }
 
         /// <summary>
         /// Causes this <see cref="DrawableOsuHitObject"/> to get missed, disregarding all conditions in implementations of <see cref="DrawableHitObject.CheckForResult"/>.

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSlider.cs

@@ -11,6 +11,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Audio;
+using osu.Game.Graphics.Containers;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Skinning;
@@ -34,6 +35,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         public SkinnableDrawable Body { get; private set; }
 
+        private ShakeContainer shakeContainer;
+
         /// <summary>
         /// A target container which can be used to add top level elements to the slider's display.
         /// Intended to be used for proxy purposes only.
@@ -74,17 +77,26 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         [BackgroundDependencyLoader]
         private void load()
         {
-            InternalChildren = new Drawable[]
+            AddRangeInternal(new Drawable[]
+            {
+                shakeContainer = new ShakeContainer
+                {
+                    ShakeDuration = 30,
+                    RelativeSizeAxes = Axes.Both,
+                    Children = new Drawable[]
                     {
                         Body = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SliderBody), _ => new DefaultSliderBody(), confineMode: ConfineMode.NoScaling),
                         tailContainer = new Container<DrawableSliderTail> { RelativeSizeAxes = Axes.Both },
                         tickContainer = new Container<DrawableSliderTick> { RelativeSizeAxes = Axes.Both },
                         repeatContainer = new Container<DrawableSliderRepeat> { RelativeSizeAxes = Axes.Both },
+                    }
+                },
+                // slider head is not included in shake as it handles hit detection, and handles its own shaking.
                 headContainer = new Container<DrawableSliderHead> { RelativeSizeAxes = Axes.Both },
                 OverlayElementContainer = new Container { RelativeSizeAxes = Axes.Both, },
                 Ball,
                 slidingSample = new PausableSkinnableSound { Looping = true }
-            };
+            });
 
             PositionBindable.BindValueChanged(_ => Position = HitObject.StackedPosition);
             StackHeightBindable.BindValueChanged(_ => Position = HitObject.StackedPosition);
@@ -109,6 +121,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             PathVersion.BindTo(HitObject.Path.Version);
         }
 
+        public override void Shake() => shakeContainer.Shake();
+
         protected override void OnFree()
         {
             base.OnFree();

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderHead.cs

@@ -63,7 +63,6 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             pathVersion.BindTo(DrawableSlider.PathVersion);
 
-            OnShake = DrawableSlider.Shake;
             CheckHittable = (d, t) => DrawableSlider.CheckHittable?.Invoke(d, t) ?? true;
         }
 
@@ -96,9 +95,11 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             return result.IsHit() ? HitResult.LargeTickHit : HitResult.LargeTickMiss;
         }
 
-        public Action<double> OnShake;
-
-        public override void Shake(double maximumLength) => OnShake?.Invoke(maximumLength);
+        public override void Shake()
+        {
+            base.Shake();
+            DrawableSlider.Shake();
+        }
 
         private void updatePosition()
         {

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderRepeat.cs

@@ -52,7 +52,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             Origin = Anchor.Centre;
             Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
 
-            InternalChild = scaleContainer = new Container
+            AddInternal(scaleContainer = new Container
             {
                 RelativeSizeAxes = Axes.Both,
                 Anchor = Anchor.Centre,
@@ -67,7 +67,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                     },
                     Arrow = new ReverseArrowPiece(),
                 }
-            };
+            });
 
             ScaleBindable.BindValueChanged(scale => scaleContainer.Scale = new Vector2(scale.NewValue));
         }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderTail.cs

@@ -58,7 +58,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             Origin = Anchor.Centre;
             Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
 
-            InternalChildren = new Drawable[]
+            AddRangeInternal(new Drawable[]
             {
                 scaleContainer = new Container
                 {
@@ -71,7 +71,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                         CirclePiece = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SliderTailHitCircle), _ => Empty())
                     }
                 },
-            };
+            });
 
             ScaleBindable.BindValueChanged(scale => scaleContainer.Scale = new Vector2(scale.NewValue));
         }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderTick.cs

@@ -44,7 +44,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
             Origin = Anchor.Centre;
 
-            InternalChild = scaleContainer = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SliderScorePoint), _ => new CircularContainer
+            AddInternal(scaleContainer = new SkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.SliderScorePoint), _ => new CircularContainer
             {
                 Masking = true,
                 Origin = Anchor.Centre,
@@ -61,7 +61,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,
-            };
+            });
 
             ScaleBindable.BindValueChanged(scale => scaleContainer.Scale = new Vector2(scale.NewValue));
         }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSpinnerTick.cs

@@ -25,7 +25,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             Origin = Anchor.Centre;
         }
 
-        protected override double MaximumJudgementOffset => DrawableSpinner.HitObject.Duration;
+        public override double MaximumJudgementOffset => DrawableSpinner.HitObject.Duration;
 
         /// <summary>
         /// Apply a judgement result.

osu.Game.Rulesets.Osu/Objects/SliderTick.cs

@@ -27,7 +27,7 @@ namespace osu.Game.Rulesets.Osu.Objects
                 // This is so on repeats ticks don't appear too late to be visually processed by the player.
                 offset = 200;
             else
-                offset = TimeFadeIn * 0.66f;
+                offset = TimePreempt * 0.66f;
 
             TimePreempt = (StartTime - SpanStartTime) / 2 + offset;
         }

osu.Game.Rulesets.Osu/OsuInputManager.cs

@@ -80,6 +80,9 @@ namespace osu.Game.Rulesets.Osu
         LeftButton,
 
         [Description("Right button")]
-        RightButton
+        RightButton,
+
+        [Description("Smoke")]
+        Smoke,
     }
 }

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -29,6 +27,7 @@ using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Replays;
 using osu.Game.Rulesets.Osu.Scoring;
+using osu.Game.Rulesets.Osu.Skinning.Argon;
 using osu.Game.Rulesets.Osu.Skinning.Legacy;
 using osu.Game.Rulesets.Osu.Statistics;
 using osu.Game.Rulesets.Osu.UI;
@@ -44,7 +43,7 @@ namespace osu.Game.Rulesets.Osu
 {
     public class OsuRuleset : Ruleset, ILegacyRuleset
     {
-        public override DrawableRuleset CreateDrawableRulesetWith(IBeatmap beatmap, IReadOnlyList<Mod> mods = null) => new DrawableOsuRuleset(this, beatmap, mods);
+        public override DrawableRuleset CreateDrawableRulesetWith(IBeatmap beatmap, IReadOnlyList<Mod>? mods = null) => new DrawableOsuRuleset(this, beatmap, mods);
 
         public override ScoreProcessor CreateScoreProcessor() => new OsuScoreProcessor();
 
@@ -60,6 +59,7 @@ namespace osu.Game.Rulesets.Osu
         {
             new KeyBinding(InputKey.Z, OsuAction.LeftButton),
             new KeyBinding(InputKey.X, OsuAction.RightButton),
+            new KeyBinding(InputKey.C, OsuAction.Smoke),
             new KeyBinding(InputKey.MouseLeft, OsuAction.LeftButton),
             new KeyBinding(InputKey.MouseRight, OsuAction.RightButton),
         };
@@ -233,13 +233,25 @@ namespace osu.Game.Rulesets.Osu
 
         public override RulesetSettingsSubsection CreateSettings() => new OsuSettingsSubsection(this);
 
-        public override ISkin CreateLegacySkinProvider(ISkin skin, IBeatmap beatmap) => new OsuLegacySkinTransformer(skin);
+        public override ISkin? CreateSkinTransformer(ISkin skin, IBeatmap beatmap)
+        {
+            switch (skin)
+            {
+                case LegacySkin:
+                    return new OsuLegacySkinTransformer(skin);
+
+                case ArgonSkin:
+                    return new OsuArgonSkinTransformer(skin);
+            }
+
+            return null;
+        }
 
         public int LegacyID => 0;
 
         public override IConvertibleReplayFrame CreateConvertibleReplayFrame() => new OsuReplayFrame();
 
-        public override IRulesetConfigManager CreateConfig(SettingsStore settings) => new OsuRulesetConfigManager(settings, RulesetInfo);
+        public override IRulesetConfigManager CreateConfig(SettingsStore? settings) => new OsuRulesetConfigManager(settings, RulesetInfo);
 
         protected override IEnumerable<HitResult> GetValidHitResults()
         {

osu.Game.Rulesets.Osu/OsuSkinComponents.cs

@@ -21,6 +21,7 @@ namespace osu.Game.Rulesets.Osu
         SliderBall,
         SliderBody,
         SpinnerBody,
+        CursorSmoke,
         ApproachCircle,
     }
 }

osu.Game.Rulesets.Osu/Replays/OsuReplayFrame.cs

@@ -31,6 +31,7 @@ namespace osu.Game.Rulesets.Osu.Replays
             Position = currentFrame.Position;
             if (currentFrame.MouseLeft) Actions.Add(OsuAction.LeftButton);
             if (currentFrame.MouseRight) Actions.Add(OsuAction.RightButton);
+            if (currentFrame.Smoke) Actions.Add(OsuAction.Smoke);
         }
 
         public LegacyReplayFrame ToLegacy(IBeatmap beatmap)
@@ -41,6 +42,8 @@ namespace osu.Game.Rulesets.Osu.Replays
                 state |= ReplayButtonState.Left1;
             if (Actions.Contains(OsuAction.RightButton))
                 state |= ReplayButtonState.Right1;
+            if (Actions.Contains(OsuAction.Smoke))
+                state |= ReplayButtonState.Smoke;
 
             return new LegacyReplayFrame(Time, Position.X, Position.Y, state);
         }

osu.Game.Rulesets.Osu/Scoring/OsuHitWindows.cs

@@ -1,20 +1,23 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Game.Rulesets.Scoring;
 
 namespace osu.Game.Rulesets.Osu.Scoring
 {
     public class OsuHitWindows : HitWindows
     {
+        /// <summary>
+        /// osu! ruleset has a fixed miss window regardless of difficulty settings.
+        /// </summary>
+        public const double MISS_WINDOW = 400;
+
         private static readonly DifficultyRange[] osu_ranges =
         {
             new DifficultyRange(HitResult.Great, 80, 50, 20),
             new DifficultyRange(HitResult.Ok, 140, 100, 60),
             new DifficultyRange(HitResult.Meh, 200, 150, 100),
-            new DifficultyRange(HitResult.Miss, 400, 400, 400),
+            new DifficultyRange(HitResult.Miss, MISS_WINDOW, MISS_WINDOW, MISS_WINDOW),
         };
 
         public override bool IsHitResultAllowed(HitResult result)

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonCursor.cs

@@ -0,0 +1,80 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.Osu.UI.Cursor;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonCursor : OsuCursorSprite
+    {
+        public ArgonCursor()
+        {
+            RelativeSizeAxes = Axes.Both;
+
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+
+            InternalChildren = new[]
+            {
+                ExpandTarget = new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    BorderThickness = 6,
+                    BorderColour = ColourInfo.GradientVertical(Colour4.FromHex("FC618F"), Colour4.FromHex("BB1A41")),
+                    Children = new Drawable[]
+                    {
+                        new Box
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Alpha = 0.4f,
+                            Colour = Colour4.FromHex("FC618F").Darken(0.6f),
+                        },
+                        new CircularContainer
+                        {
+                            Origin = Anchor.Centre,
+                            Anchor = Anchor.Centre,
+                            RelativeSizeAxes = Axes.Both,
+                            Masking = true,
+                            BorderThickness = 2,
+                            BorderColour = Color4.White.Opacity(0.8f),
+                            Children = new Drawable[]
+                            {
+                                new Box
+                                {
+                                    RelativeSizeAxes = Axes.Both,
+                                    Alpha = 0,
+                                    AlwaysPresent = true,
+                                },
+                            },
+                        },
+                    },
+                },
+                new Circle
+                {
+                    Origin = Anchor.Centre,
+                    Anchor = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Scale = new Vector2(0.2f),
+                    Colour = new Color4(255, 255, 255, 255),
+                    EdgeEffect = new EdgeEffectParameters
+                    {
+                        Type = EdgeEffectType.Glow,
+                        Radius = 20,
+                        Colour = new Color4(171, 255, 255, 100),
+                    },
+                },
+            };
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonCursorTrail.cs

@@ -0,0 +1,29 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Textures;
+using osu.Game.Rulesets.Osu.UI.Cursor;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonCursorTrail : CursorTrail
+    {
+        protected override float IntervalMultiplier => 0.4f;
+
+        protected override float FadeExponent => 4;
+
+        [BackgroundDependencyLoader]
+        private void load(TextureStore textures)
+        {
+            Texture = textures.Get(@"Cursor/cursortrail");
+            Scale = new Vector2(0.8f / Texture.ScaleAdjust);
+
+            Blending = BlendingParameters.Additive;
+
+            Alpha = 0.8f;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonFollowCircle.cs

@@ -0,0 +1,71 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Utils;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonFollowCircle : FollowCircle
+    {
+        public ArgonFollowCircle()
+        {
+            InternalChild = new CircularContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+                Masking = true,
+                BorderThickness = 4,
+                BorderColour = ColourInfo.GradientVertical(Colour4.FromHex("FC618F"), Colour4.FromHex("BB1A41")),
+                Blending = BlendingParameters.Additive,
+                Child = new Box
+                {
+                    Colour = ColourInfo.GradientVertical(Colour4.FromHex("FC618F"), Colour4.FromHex("BB1A41")),
+                    RelativeSizeAxes = Axes.Both,
+                    Alpha = 0.3f,
+                }
+            };
+        }
+
+        protected override void OnSliderPress()
+        {
+            const float duration = 300f;
+
+            if (Precision.AlmostEquals(0, Alpha))
+                this.ScaleTo(1);
+
+            this.ScaleTo(DrawableSliderBall.FOLLOW_AREA, duration, Easing.OutQuint)
+                .FadeIn(duration, Easing.OutQuint);
+        }
+
+        protected override void OnSliderRelease()
+        {
+            const float duration = 150;
+
+            this.ScaleTo(DrawableSliderBall.FOLLOW_AREA * 1.2f, duration, Easing.OutQuint)
+                .FadeTo(0, duration, Easing.OutQuint);
+        }
+
+        protected override void OnSliderEnd()
+        {
+            const float duration = 300;
+
+            this.ScaleTo(1, duration, Easing.OutQuint)
+                .FadeOut(duration / 2, Easing.OutQuint);
+        }
+
+        protected override void OnSliderTick()
+        {
+            this.ScaleTo(DrawableSliderBall.FOLLOW_AREA * 1.08f, 40, Easing.OutQuint)
+                .Then()
+                .ScaleTo(DrawableSliderBall.FOLLOW_AREA, 200f, Easing.OutQuint);
+        }
+
+        protected override void OnSliderBreak()
+        {
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonFollowPoint.cs

@@ -0,0 +1,39 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonFollowPoint : CompositeDrawable
+    {
+        public ArgonFollowPoint()
+        {
+            Blending = BlendingParameters.Additive;
+
+            Colour = ColourInfo.GradientVertical(Colour4.FromHex("FC618F"), Colour4.FromHex("BB1A41"));
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                new SpriteIcon
+                {
+                    Icon = FontAwesome.Solid.ChevronRight,
+                    Size = new Vector2(8),
+                    Colour = OsuColour.Gray(0.2f),
+                },
+                new SpriteIcon
+                {
+                    Icon = FontAwesome.Solid.ChevronRight,
+                    Size = new Vector2(8),
+                    X = 4,
+                },
+            };
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonJudgementPiece.cs

@@ -0,0 +1,171 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Utils;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Osu.Skinning.Default;
+using osu.Game.Rulesets.Scoring;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonJudgementPiece : CompositeDrawable, IAnimatableJudgement
+    {
+        protected readonly HitResult Result;
+
+        protected SpriteText JudgementText { get; private set; } = null!;
+
+        private RingExplosion? ringExplosion;
+
+        [Resolved]
+        private OsuColour colours { get; set; } = null!;
+
+        public ArgonJudgementPiece(HitResult result)
+        {
+            Result = result;
+            Origin = Anchor.Centre;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                JudgementText = new OsuSpriteText
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Text = Result.GetDescription().ToUpperInvariant(),
+                    Colour = colours.ForHitResult(Result),
+                    Blending = BlendingParameters.Additive,
+                    Spacing = new Vector2(5, 0),
+                    Font = OsuFont.Default.With(size: 20, weight: FontWeight.Bold),
+                },
+            };
+
+            if (Result.IsHit())
+            {
+                AddInternal(ringExplosion = new RingExplosion(Result)
+                {
+                    Colour = colours.ForHitResult(Result),
+                });
+            }
+        }
+
+        /// <summary>
+        /// Plays the default animation for this judgement piece.
+        /// </summary>
+        /// <remarks>
+        /// The base implementation only handles fade (for all result types) and misses.
+        /// Individual rulesets are recommended to implement their appropriate hit animations.
+        /// </remarks>
+        public virtual void PlayAnimation()
+        {
+            switch (Result)
+            {
+                default:
+                    JudgementText
+                        .ScaleTo(Vector2.One)
+                        .ScaleTo(new Vector2(1.2f), 1800, Easing.OutQuint);
+                    break;
+
+                case HitResult.Miss:
+                    this.ScaleTo(1.6f);
+                    this.ScaleTo(1, 100, Easing.In);
+
+                    this.MoveTo(Vector2.Zero);
+                    this.MoveToOffset(new Vector2(0, 100), 800, Easing.InQuint);
+
+                    this.RotateTo(0);
+                    this.RotateTo(40, 800, Easing.InQuint);
+                    break;
+            }
+
+            this.FadeOutFromOne(800);
+
+            ringExplosion?.PlayAnimation();
+        }
+
+        public Drawable? GetAboveHitObjectsProxiedContent() => null;
+
+        private class RingExplosion : CompositeDrawable
+        {
+            private readonly float travel = 52;
+
+            public RingExplosion(HitResult result)
+            {
+                const float thickness = 4;
+
+                const float small_size = 9;
+                const float large_size = 14;
+
+                Anchor = Anchor.Centre;
+                Origin = Anchor.Centre;
+
+                Blending = BlendingParameters.Additive;
+
+                int countSmall = 0;
+                int countLarge = 0;
+
+                switch (result)
+                {
+                    case HitResult.Meh:
+                        countSmall = 3;
+                        travel *= 0.3f;
+                        break;
+
+                    case HitResult.Ok:
+                    case HitResult.Good:
+                        countSmall = 4;
+                        travel *= 0.6f;
+                        break;
+
+                    case HitResult.Great:
+                    case HitResult.Perfect:
+                        countSmall = 4;
+                        countLarge = 4;
+                        break;
+                }
+
+                for (int i = 0; i < countSmall; i++)
+                    AddInternal(new RingPiece(thickness) { Size = new Vector2(small_size) });
+
+                for (int i = 0; i < countLarge; i++)
+                    AddInternal(new RingPiece(thickness) { Size = new Vector2(large_size) });
+            }
+
+            public void PlayAnimation()
+            {
+                foreach (var c in InternalChildren)
+                {
+                    const float start_position_ratio = 0.3f;
+
+                    float direction = RNG.NextSingle(0, 360);
+                    float distance = RNG.NextSingle(travel / 2, travel);
+
+                    c.MoveTo(new Vector2(
+                        MathF.Cos(direction) * distance * start_position_ratio,
+                        MathF.Sin(direction) * distance * start_position_ratio
+                    ));
+
+                    c.MoveTo(new Vector2(
+                        MathF.Cos(direction) * distance,
+                        MathF.Sin(direction) * distance
+                    ), 600, Easing.OutQuint);
+                }
+
+                this.FadeOutFromOne(1000, Easing.OutQuint);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonMainCirclePiece.cs

@@ -0,0 +1,226 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Skinning.Default;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonMainCirclePiece : CompositeDrawable
+    {
+        public const float BORDER_THICKNESS = (OsuHitObject.OBJECT_RADIUS * 2) * (2f / 58);
+
+        public const float GRADIENT_THICKNESS = BORDER_THICKNESS * 2.5f;
+
+        public const float OUTER_GRADIENT_SIZE = (OsuHitObject.OBJECT_RADIUS * 2) - BORDER_THICKNESS * 4;
+
+        public const float INNER_GRADIENT_SIZE = OUTER_GRADIENT_SIZE - GRADIENT_THICKNESS * 2;
+        public const float INNER_FILL_SIZE = INNER_GRADIENT_SIZE - GRADIENT_THICKNESS * 2;
+
+        private readonly Circle outerFill;
+        private readonly Circle outerGradient;
+        private readonly Circle innerGradient;
+        private readonly Circle innerFill;
+
+        private readonly RingPiece border;
+        private readonly OsuSpriteText number;
+
+        private readonly IBindable<Color4> accentColour = new Bindable<Color4>();
+        private readonly IBindable<int> indexInCurrentCombo = new Bindable<int>();
+        private readonly FlashPiece flash;
+
+        [Resolved]
+        private DrawableHitObject drawableObject { get; set; } = null!;
+
+        public ArgonMainCirclePiece(bool withOuterFill)
+        {
+            Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
+
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+
+            InternalChildren = new Drawable[]
+            {
+                outerFill = new Circle // renders white outer border and dark fill
+                {
+                    Size = Size,
+                    Alpha = withOuterFill ? 1 : 0,
+                },
+                outerGradient = new Circle // renders the outer bright gradient
+                {
+                    Size = new Vector2(OUTER_GRADIENT_SIZE),
+                    Alpha = 1,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                innerGradient = new Circle // renders the inner bright gradient
+                {
+                    Size = new Vector2(INNER_GRADIENT_SIZE),
+                    Alpha = 1,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                innerFill = new Circle // renders the inner dark fill
+                {
+                    Size = new Vector2(INNER_FILL_SIZE),
+                    Alpha = 1,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                number = new OsuSpriteText
+                {
+                    Font = OsuFont.Default.With(size: 52, weight: FontWeight.Bold),
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Y = -2,
+                    Text = @"1",
+                },
+                flash = new FlashPiece(),
+                border = new RingPiece(BORDER_THICKNESS),
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            var drawableOsuObject = (DrawableOsuHitObject)drawableObject;
+
+            accentColour.BindTo(drawableObject.AccentColour);
+            indexInCurrentCombo.BindTo(drawableOsuObject.IndexInCurrentComboBindable);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            accentColour.BindValueChanged(colour =>
+            {
+                outerFill.Colour = innerFill.Colour = colour.NewValue.Darken(4);
+                outerGradient.Colour = ColourInfo.GradientVertical(colour.NewValue, colour.NewValue.Darken(0.1f));
+                innerGradient.Colour = ColourInfo.GradientVertical(colour.NewValue.Darken(0.5f), colour.NewValue.Darken(0.6f));
+                flash.Colour = colour.NewValue;
+            }, true);
+
+            indexInCurrentCombo.BindValueChanged(index => number.Text = (index.NewValue + 1).ToString(), true);
+
+            drawableObject.ApplyCustomUpdateState += updateStateTransforms;
+            updateStateTransforms(drawableObject, drawableObject.State.Value);
+        }
+
+        private void updateStateTransforms(DrawableHitObject drawableHitObject, ArmedState state)
+        {
+            using (BeginAbsoluteSequence(drawableObject.HitStateUpdateTime))
+            {
+                switch (state)
+                {
+                    case ArmedState.Hit:
+                        // Fade out time is at a maximum of 800. Must match `DrawableHitCircle`'s arbitrary lifetime spec.
+                        const double fade_out_time = 800;
+
+                        const double flash_in_duration = 150;
+                        const double resize_duration = 400;
+
+                        const float shrink_size = 0.8f;
+
+                        // Animating with the number present is distracting.
+                        // The number disappearing is hidden by the bright flash.
+                        number.FadeOut(flash_in_duration / 2);
+
+                        // The fill layers add too much noise during the explosion animation.
+                        // They will be hidden by the additive effects anyway.
+                        outerFill.FadeOut(flash_in_duration, Easing.OutQuint);
+                        innerFill.FadeOut(flash_in_duration, Easing.OutQuint);
+
+                        // The inner-most gradient should actually be resizing, but is only visible for
+                        // a few milliseconds before it's hidden by the flash, so it's pointless overhead to bother with it.
+                        innerGradient.FadeOut(flash_in_duration, Easing.OutQuint);
+
+                        // The border is always white, but after hit it gets coloured by the skin/beatmap's colouring.
+                        // A gradient is applied to make the border less prominent over the course of the animation.
+                        // Without this, the border dominates the visual presence of the explosion animation in a bad way.
+                        border.TransformTo(nameof
+                            (BorderColour), ColourInfo.GradientVertical(
+                            accentColour.Value.Opacity(0.5f),
+                            accentColour.Value.Opacity(0)), fade_out_time);
+
+                        // The outer ring shrinks immediately, but accounts for its thickness so it doesn't overlap the inner
+                        // gradient layers.
+                        border.ResizeTo(Size * shrink_size + new Vector2(border.BorderThickness), resize_duration, Easing.OutElasticHalf);
+
+                        // The outer gradient is resize with a slight delay from the border.
+                        // This is to give it a bomb-like effect, with the border "triggering" its animation when getting close.
+                        using (BeginDelayedSequence(flash_in_duration / 12))
+                        {
+                            outerGradient.ResizeTo(outerGradient.Size * shrink_size, resize_duration, Easing.OutElasticHalf);
+                            outerGradient
+                                .FadeColour(Color4.White, 80)
+                                .Then()
+                                .FadeOut(flash_in_duration);
+                        }
+
+                        // The flash layer starts white to give the wanted brightness, but is almost immediately
+                        // recoloured to the accent colour. This would more correctly be done with two layers (one for the initial flash)
+                        // but works well enough with the colour fade.
+                        flash.FadeTo(1, flash_in_duration, Easing.OutQuint);
+                        flash.FlashColour(accentColour.Value, fade_out_time, Easing.OutQuint);
+
+                        this.FadeOut(fade_out_time, Easing.OutQuad);
+                        break;
+                }
+            }
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (drawableObject.IsNotNull())
+                drawableObject.ApplyCustomUpdateState -= updateStateTransforms;
+        }
+
+        private class FlashPiece : Circle
+        {
+            public FlashPiece()
+            {
+                Size = new Vector2(OsuHitObject.OBJECT_RADIUS);
+
+                Anchor = Anchor.Centre;
+                Origin = Anchor.Centre;
+
+                Alpha = 0;
+                Blending = BlendingParameters.Additive;
+
+                // The edge effect provides the fill due to not being rendered hollow.
+                Child.Alpha = 0;
+                Child.AlwaysPresent = true;
+            }
+
+            protected override void Update()
+            {
+                base.Update();
+
+                EdgeEffect = new EdgeEffectParameters
+                {
+                    Type = EdgeEffectType.Glow,
+                    Colour = Colour,
+                    Radius = OsuHitObject.OBJECT_RADIUS * 1.2f,
+                };
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonReverseArrow.cs

@@ -0,0 +1,54 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonReverseArrow : CompositeDrawable
+    {
+        private Bindable<Color4> accentColour = null!;
+
+        private SpriteIcon icon = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(DrawableHitObject hitObject)
+        {
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+
+            Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
+
+            InternalChildren = new Drawable[]
+            {
+                new Circle
+                {
+                    Size = new Vector2(40, 20),
+                    Colour = Color4.White,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                icon = new SpriteIcon
+                {
+                    Icon = FontAwesome.Solid.AngleDoubleRight,
+                    Size = new Vector2(16),
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+            };
+
+            accentColour = hitObject.AccentColour.GetBoundCopy();
+            accentColour.BindValueChanged(accent => icon.Colour = accent.NewValue.Darken(4), true);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonSliderBall.cs

@@ -0,0 +1,109 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonSliderBall : CircularContainer
+    {
+        private readonly Box fill;
+        private readonly SpriteIcon icon;
+
+        private readonly Vector2 defaultIconScale = new Vector2(0.6f, 0.8f);
+
+        [Resolved(canBeNull: true)]
+        private DrawableHitObject? parentObject { get; set; }
+
+        public ArgonSliderBall()
+        {
+            Size = new Vector2(ArgonMainCirclePiece.OUTER_GRADIENT_SIZE);
+
+            Masking = true;
+
+            BorderThickness = ArgonMainCirclePiece.GRADIENT_THICKNESS;
+            BorderColour = Color4.White;
+
+            InternalChildren = new Drawable[]
+            {
+                fill = new Box
+                {
+                    Colour = ColourInfo.GradientVertical(Colour4.FromHex("FC618F"), Colour4.FromHex("BB1A41")),
+                    RelativeSizeAxes = Axes.Both,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                icon = new SpriteIcon
+                {
+                    Size = new Vector2(48),
+                    Scale = defaultIconScale,
+                    Icon = FontAwesome.Solid.AngleRight,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            if (parentObject != null)
+            {
+                parentObject.ApplyCustomUpdateState += updateStateTransforms;
+                updateStateTransforms(parentObject, parentObject.State.Value);
+            }
+        }
+
+        private void updateStateTransforms(DrawableHitObject drawableObject, ArmedState _)
+        {
+            // Gets called by slider ticks, tails, etc., leading to duplicated
+            // animations which in this case have no visual impact (due to
+            // instant fade) but may negatively affect performance
+            if (drawableObject is not DrawableSlider)
+                return;
+
+            const float duration = 200;
+            const float icon_scale = 0.9f;
+
+            using (BeginAbsoluteSequence(drawableObject.StateUpdateTime))
+            {
+                this.FadeInFromZero(duration, Easing.OutQuint);
+                icon.ScaleTo(0).Then().ScaleTo(defaultIconScale, duration, Easing.OutElasticHalf);
+            }
+
+            using (BeginAbsoluteSequence(drawableObject.HitStateUpdateTime))
+            {
+                this.FadeOut(duration, Easing.OutQuint);
+                icon.ScaleTo(defaultIconScale * icon_scale, duration, Easing.OutQuint);
+            }
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            //undo rotation on layers which should not be rotated.
+            float appliedRotation = Parent.Rotation;
+
+            fill.Rotation = -appliedRotation;
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (parentObject != null)
+                parentObject.ApplyCustomUpdateState -= updateStateTransforms;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonSliderBody.cs

@@ -0,0 +1,40 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Game.Rulesets.Osu.Skinning.Default;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonSliderBody : PlaySliderBody
+    {
+        protected override void LoadComplete()
+        {
+            const float path_radius = ArgonMainCirclePiece.OUTER_GRADIENT_SIZE / 2;
+
+            base.LoadComplete();
+
+            AccentColourBindable.BindValueChanged(accent => BorderColour = accent.NewValue, true);
+            ScaleBindable.BindValueChanged(scale => PathRadius = path_radius * scale.NewValue, true);
+
+            // This border size thing is kind of weird, hey.
+            const float intended_thickness = ArgonMainCirclePiece.GRADIENT_THICKNESS / path_radius;
+
+            BorderSize = intended_thickness / Default.DrawableSliderPath.BORDER_PORTION;
+        }
+
+        protected override Default.DrawableSliderPath CreateSliderPath() => new DrawableSliderPath();
+
+        private class DrawableSliderPath : Default.DrawableSliderPath
+        {
+            protected override Color4 ColourAt(float position)
+            {
+                if (CalculatedBorderPortion != 0f && position <= CalculatedBorderPortion)
+                    return BorderColour;
+
+                return AccentColour.Darken(4);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonSliderScorePoint.cs

@@ -0,0 +1,40 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Rulesets.Objects.Drawables;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonSliderScorePoint : CircularContainer
+    {
+        private Bindable<Color4> accentColour = null!;
+
+        private const float size = 12;
+
+        [BackgroundDependencyLoader]
+        private void load(DrawableHitObject hitObject)
+        {
+            Masking = true;
+            Origin = Anchor.Centre;
+            Size = new Vector2(size);
+            BorderThickness = 3;
+            BorderColour = Color4.White;
+            Child = new Box
+            {
+                RelativeSizeAxes = Axes.Both,
+                AlwaysPresent = true,
+                Alpha = 0,
+            };
+
+            accentColour = hitObject.AccentColour.GetBoundCopy();
+            accentColour.BindValueChanged(accent => BorderColour = accent.NewValue, true);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonSpinner.cs

@@ -0,0 +1,146 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Globalization;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonSpinner : CompositeDrawable
+    {
+        private DrawableSpinner drawableSpinner = null!;
+
+        private OsuSpriteText bonusCounter = null!;
+
+        private Container spmContainer = null!;
+        private OsuSpriteText spmCounter = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(DrawableHitObject drawableHitObject)
+        {
+            RelativeSizeAxes = Axes.Both;
+            Anchor = Anchor.Centre;
+            Origin = Anchor.Centre;
+
+            drawableSpinner = (DrawableSpinner)drawableHitObject;
+
+            InternalChildren = new Drawable[]
+            {
+                bonusCounter = new OsuSpriteText
+                {
+                    Alpha = 0,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Font = OsuFont.Default.With(size: 24),
+                    Y = -120,
+                },
+                new ArgonSpinnerDisc
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                },
+                bonusCounter = new OsuSpriteText
+                {
+                    Alpha = 0,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Font = OsuFont.Default.With(size: 28, weight: FontWeight.Bold),
+                    Y = -100,
+                },
+                spmContainer = new Container
+                {
+                    Alpha = 0f,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Y = 60,
+                    Children = new[]
+                    {
+                        spmCounter = new OsuSpriteText
+                        {
+                            Anchor = Anchor.TopCentre,
+                            Origin = Anchor.TopCentre,
+                            Text = @"0",
+                            Font = OsuFont.Default.With(size: 28, weight: FontWeight.SemiBold)
+                        },
+                        new OsuSpriteText
+                        {
+                            Anchor = Anchor.TopCentre,
+                            Origin = Anchor.TopCentre,
+                            Text = @"SPINS PER MINUTE",
+                            Font = OsuFont.Default.With(size: 16, weight: FontWeight.SemiBold),
+                            Y = 30
+                        }
+                    }
+                }
+            };
+        }
+
+        private IBindable<double> gainedBonus = null!;
+        private IBindable<double> spinsPerMinute = null!;
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            gainedBonus = drawableSpinner.GainedBonus.GetBoundCopy();
+            gainedBonus.BindValueChanged(bonus =>
+            {
+                bonusCounter.Text = bonus.NewValue.ToString(NumberFormatInfo.InvariantInfo);
+                bonusCounter.FadeOutFromOne(1500);
+                bonusCounter.ScaleTo(1.5f).Then().ScaleTo(1f, 1000, Easing.OutQuint);
+            });
+
+            spinsPerMinute = drawableSpinner.SpinsPerMinute.GetBoundCopy();
+            spinsPerMinute.BindValueChanged(spm =>
+            {
+                spmCounter.Text = Math.Truncate(spm.NewValue).ToString(@"#0");
+            }, true);
+
+            drawableSpinner.ApplyCustomUpdateState += updateStateTransforms;
+            updateStateTransforms(drawableSpinner, drawableSpinner.State.Value);
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            if (!spmContainer.IsPresent && drawableSpinner.Result?.TimeStarted != null)
+                fadeCounterOnTimeStart();
+        }
+
+        private void updateStateTransforms(DrawableHitObject drawableHitObject, ArmedState state)
+        {
+            if (!(drawableHitObject is DrawableSpinner))
+                return;
+
+            fadeCounterOnTimeStart();
+        }
+
+        private void fadeCounterOnTimeStart()
+        {
+            if (drawableSpinner.Result?.TimeStarted is double startTime)
+            {
+                using (BeginAbsoluteSequence(startTime))
+                    spmContainer.FadeIn(drawableSpinner.HitObject.TimeFadeIn);
+            }
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (drawableSpinner.IsNotNull())
+                drawableSpinner.ApplyCustomUpdateState -= updateStateTransforms;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonSpinnerDisc.cs

@@ -0,0 +1,247 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Diagnostics;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Utils;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Skinning.Default;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonSpinnerDisc : CompositeDrawable
+    {
+        private const float initial_scale = 1f;
+        private const float idle_alpha = 0.2f;
+        private const float tracking_alpha = 0.4f;
+
+        private const float idle_centre_size = 80f;
+        private const float tracking_centre_size = 40f;
+
+        private DrawableSpinner drawableSpinner = null!;
+
+        private readonly BindableBool complete = new BindableBool();
+
+        private int wholeRotationCount;
+
+        private bool checkNewRotationCount
+        {
+            get
+            {
+                int rotations = (int)(drawableSpinner.Result.RateAdjustedRotation / 360);
+
+                if (wholeRotationCount == rotations) return false;
+
+                wholeRotationCount = rotations;
+                return true;
+            }
+        }
+
+        private Container disc = null!;
+        private Container centre = null!;
+        private CircularContainer fill = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(DrawableHitObject drawableHitObject)
+        {
+            drawableSpinner = (DrawableSpinner)drawableHitObject;
+
+            // we are slightly bigger than our parent, to clip the top and bottom of the circle
+            // this should probably be revisited when scaled spinners are a thing.
+            Scale = new Vector2(initial_scale);
+
+            InternalChildren = new Drawable[]
+            {
+                disc = new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Both,
+                    Children = new Drawable[]
+                    {
+                        fill = new CircularContainer
+                        {
+                            Name = @"Fill",
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            RelativeSizeAxes = Axes.Both,
+                            Masking = true,
+                            EdgeEffect = new EdgeEffectParameters
+                            {
+                                Type = EdgeEffectType.Shadow,
+                                Colour = Colour4.FromHex("FC618F").Opacity(1f),
+                                Radius = 40,
+                            },
+                            Child = new Box
+                            {
+                                RelativeSizeAxes = Axes.Both,
+                                Alpha = 0f,
+                                AlwaysPresent = true,
+                            }
+                        },
+                        new CircularContainer
+                        {
+                            Name = @"Ring",
+                            Masking = true,
+                            BorderColour = Color4.White,
+                            BorderThickness = 5,
+                            RelativeSizeAxes = Axes.Both,
+                            Child = new Box
+                            {
+                                RelativeSizeAxes = Axes.Both,
+                                Alpha = 0,
+                                AlwaysPresent = true,
+                            }
+                        },
+                        new ArgonSpinnerTicks(),
+                    }
+                },
+                centre = new Container
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(idle_centre_size),
+                    Children = new[]
+                    {
+                        new RingPiece(10)
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Size = new Vector2(0.8f),
+                        },
+                        new RingPiece(3)
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Size = new Vector2(1f),
+                        }
+                    },
+                },
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            drawableSpinner.ApplyCustomUpdateState += updateStateTransforms;
+
+            updateStateTransforms(drawableSpinner, drawableSpinner.State.Value);
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            complete.Value = Time.Current >= drawableSpinner.Result.TimeCompleted;
+
+            if (complete.Value)
+            {
+                if (checkNewRotationCount)
+                {
+                    fill.FinishTransforms(false, nameof(Alpha));
+                    fill
+                        .FadeTo(tracking_alpha + 0.2f, 60, Easing.OutExpo)
+                        .Then()
+                        .FadeTo(tracking_alpha, 250, Easing.OutQuint);
+                }
+            }
+            else
+            {
+                fill.Alpha = (float)Interpolation.Damp(fill.Alpha, drawableSpinner.RotationTracker.Tracking ? tracking_alpha : idle_alpha, 0.98f, (float)Math.Abs(Clock.ElapsedFrameTime));
+            }
+
+            if (centre.Width == idle_centre_size && drawableSpinner.Result?.TimeStarted != null)
+                updateCentrePieceSize();
+
+            const float initial_fill_scale = 0.1f;
+            float targetScale = initial_fill_scale + (0.98f - initial_fill_scale) * drawableSpinner.Progress;
+
+            fill.Scale = new Vector2((float)Interpolation.Lerp(fill.Scale.X, targetScale, Math.Clamp(Math.Abs(Time.Elapsed) / 100, 0, 1)));
+            disc.Rotation = drawableSpinner.RotationTracker.Rotation;
+        }
+
+        private void updateStateTransforms(DrawableHitObject drawableHitObject, ArmedState state)
+        {
+            if (!(drawableHitObject is DrawableSpinner))
+                return;
+
+            Spinner spinner = drawableSpinner.HitObject;
+
+            using (BeginAbsoluteSequence(spinner.StartTime - spinner.TimePreempt))
+            {
+                this.ScaleTo(initial_scale);
+                this.RotateTo(0);
+
+                using (BeginDelayedSequence(spinner.TimePreempt / 2))
+                {
+                    // constant ambient rotation to give the spinner "spinning" character.
+                    this.RotateTo((float)(25 * spinner.Duration / 2000), spinner.TimePreempt + spinner.Duration);
+                }
+
+                using (BeginDelayedSequence(spinner.TimePreempt + spinner.Duration + drawableHitObject.Result.TimeOffset))
+                {
+                    switch (state)
+                    {
+                        case ArmedState.Hit:
+                            this.ScaleTo(initial_scale * 1.2f, 320, Easing.Out);
+                            this.RotateTo(Rotation + 180, 320);
+                            break;
+
+                        case ArmedState.Miss:
+                            this.ScaleTo(initial_scale * 0.8f, 320, Easing.In);
+                            break;
+                    }
+                }
+            }
+
+            using (BeginAbsoluteSequence(spinner.StartTime - spinner.TimePreempt))
+            {
+                centre.ScaleTo(0);
+                disc.ScaleTo(0);
+
+                using (BeginDelayedSequence(spinner.TimePreempt / 2))
+                {
+                    centre.ScaleTo(0.3f, spinner.TimePreempt / 4, Easing.OutQuint);
+                    disc.ScaleTo(0.2f, spinner.TimePreempt / 4, Easing.OutQuint);
+
+                    using (BeginDelayedSequence(spinner.TimePreempt / 2))
+                    {
+                        centre.ScaleTo(0.8f, spinner.TimePreempt / 2, Easing.OutQuint);
+                        disc.ScaleTo(1, spinner.TimePreempt / 2, Easing.OutQuint);
+                    }
+                }
+            }
+
+            if (drawableSpinner.Result?.TimeStarted != null)
+                updateCentrePieceSize();
+        }
+
+        private void updateCentrePieceSize()
+        {
+            Debug.Assert(drawableSpinner.Result?.TimeStarted != null);
+
+            Spinner spinner = drawableSpinner.HitObject;
+
+            using (BeginAbsoluteSequence(drawableSpinner.Result.TimeStarted.Value))
+                centre.ResizeTo(new Vector2(tracking_centre_size), spinner.TimePreempt / 2, Easing.OutQuint);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (drawableSpinner.IsNotNull())
+                drawableSpinner.ApplyCustomUpdateState -= updateStateTransforms;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/ArgonSpinnerTicks.cs

@@ -0,0 +1,61 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Effects;
+using osu.Framework.Graphics.Shapes;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class ArgonSpinnerTicks : CompositeDrawable
+    {
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Origin = Anchor.Centre;
+            Anchor = Anchor.Centre;
+            RelativeSizeAxes = Axes.Both;
+
+            const float count = 25;
+
+            for (float i = 0; i < count; i++)
+            {
+                AddInternal(new CircularContainer
+                {
+                    RelativePositionAxes = Axes.Both,
+                    Masking = true,
+                    CornerRadius = 5,
+                    BorderColour = Color4.White,
+                    BorderThickness = 2f,
+                    Size = new Vector2(30, 5),
+                    Origin = Anchor.Centre,
+                    Position = new Vector2(
+                        0.5f + MathF.Sin(i / count * 2 * MathF.PI) / 2 * 0.75f,
+                        0.5f + MathF.Cos(i / count * 2 * MathF.PI) / 2 * 0.75f
+                    ),
+                    Rotation = -i / count * 360 - 120,
+                    EdgeEffect = new EdgeEffectParameters
+                    {
+                        Type = EdgeEffectType.Shadow,
+                        Colour = Colour4.White.Opacity(0.2f),
+                        Radius = 30,
+                    },
+                    Children = new[]
+                    {
+                        new Box
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Alpha = 0,
+                            AlwaysPresent = true,
+                        }
+                    }
+                });
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Argon/OsuArgonSkinTransformer.cs

@@ -0,0 +1,68 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Skinning;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Argon
+{
+    public class OsuArgonSkinTransformer : SkinTransformer
+    {
+        public OsuArgonSkinTransformer(ISkin skin)
+            : base(skin)
+        {
+        }
+
+        public override Drawable? GetDrawableComponent(ISkinComponent component)
+        {
+            switch (component)
+            {
+                case GameplaySkinComponent<HitResult> resultComponent:
+                    return new ArgonJudgementPiece(resultComponent.Component);
+
+                case OsuSkinComponent osuComponent:
+                    // TODO: Once everything is finalised, consider throwing UnsupportedSkinComponentException on missing entries.
+                    switch (osuComponent.Component)
+                    {
+                        case OsuSkinComponents.HitCircle:
+                            return new ArgonMainCirclePiece(true);
+
+                        case OsuSkinComponents.SliderHeadHitCircle:
+                            return new ArgonMainCirclePiece(false);
+
+                        case OsuSkinComponents.SliderBody:
+                            return new ArgonSliderBody();
+
+                        case OsuSkinComponents.SliderBall:
+                            return new ArgonSliderBall();
+
+                        case OsuSkinComponents.SliderFollowCircle:
+                            return new ArgonFollowCircle();
+
+                        case OsuSkinComponents.SliderScorePoint:
+                            return new ArgonSliderScorePoint();
+
+                        case OsuSkinComponents.SpinnerBody:
+                            return new ArgonSpinner();
+
+                        case OsuSkinComponents.ReverseArrow:
+                            return new ArgonReverseArrow();
+
+                        case OsuSkinComponents.FollowPoint:
+                            return new ArgonFollowPoint();
+
+                        case OsuSkinComponents.Cursor:
+                            return new ArgonCursor();
+
+                        case OsuSkinComponents.CursorTrail:
+                            return new ArgonCursorTrail();
+                    }
+
+                    break;
+            }
+
+            return base.GetDrawableComponent(component);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Default/DefaultSmokeSegment.cs

@@ -0,0 +1,19 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Textures;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Default
+{
+    public class DefaultSmokeSegment : SmokeSegment
+    {
+        [BackgroundDependencyLoader]
+        private void load(TextureStore textures)
+        {
+            // ISkinSource doesn't currently fallback to global textures.
+            // We might want to change this in the future if the intention is to allow the user to skin this as per legacy skins.
+            Texture = textures.Get("Gameplay/osu/cursor-smoke");
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Default/DrawableSliderPath.cs

@@ -10,8 +10,8 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
 {
     public abstract class DrawableSliderPath : SmoothPath
     {
-        protected const float BORDER_PORTION = 0.128f;
-        protected const float GRADIENT_PORTION = 1 - BORDER_PORTION;
+        public const float BORDER_PORTION = 0.128f;
+        public const float GRADIENT_PORTION = 1 - BORDER_PORTION;
 
         private const float border_max_size = 8f;
         private const float border_min_size = 0f;

osu.Game.Rulesets.Osu/Skinning/Default/PlaySliderBody.cs

@@ -16,9 +16,11 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
 {
     public abstract class PlaySliderBody : SnakingSliderBody
     {
-        private IBindable<float> scaleBindable;
+        protected IBindable<float> ScaleBindable { get; private set; } = null!;
+
+        protected IBindable<Color4> AccentColourBindable { get; private set; } = null!;
+
         private IBindable<int> pathVersion;
-        private IBindable<Color4> accentColour;
 
         [Resolved(CanBeNull = true)]
         private OsuRulesetConfigManager config { get; set; }
@@ -30,14 +32,14 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
         {
             var drawableSlider = (DrawableSlider)drawableObject;
 
-            scaleBindable = drawableSlider.ScaleBindable.GetBoundCopy();
-            scaleBindable.BindValueChanged(scale => PathRadius = OsuHitObject.OBJECT_RADIUS * scale.NewValue, true);
+            ScaleBindable = drawableSlider.ScaleBindable.GetBoundCopy();
+            ScaleBindable.BindValueChanged(scale => PathRadius = OsuHitObject.OBJECT_RADIUS * scale.NewValue, true);
 
             pathVersion = drawableSlider.PathVersion.GetBoundCopy();
             pathVersion.BindValueChanged(_ => Refresh());
 
-            accentColour = drawableObject.AccentColour.GetBoundCopy();
-            accentColour.BindValueChanged(accent => AccentColour = GetBodyAccentColour(skin, accent.NewValue), true);
+            AccentColourBindable = drawableObject.AccentColour.GetBoundCopy();
+            AccentColourBindable.BindValueChanged(accent => AccentColour = GetBodyAccentColour(skin, accent.NewValue), true);
 
             config?.BindWith(OsuRulesetSetting.SnakingInSliders, SnakingIn);
             config?.BindWith(OsuRulesetSetting.SnakingOutSliders, configSnakingOut);

osu.Game.Rulesets.Osu/Skinning/Default/RingPiece.cs

@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
@@ -14,7 +12,7 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
 {
     public class RingPiece : CircularContainer
     {
-        public RingPiece()
+        public RingPiece(float thickness = 9)
         {
             Size = new Vector2(OsuHitObject.OBJECT_RADIUS * 2);
 
@@ -22,7 +20,7 @@ namespace osu.Game.Rulesets.Osu.Skinning.Default
             Origin = Anchor.Centre;
 
             Masking = true;
-            BorderThickness = 9; // roughly matches slider borders and makes stacked circles distinctly visible from each other.
+            BorderThickness = thickness;
             BorderColour = Color4.White;
 
             Child = new Box

osu.Game.Rulesets.Osu/Skinning/Legacy/LegacyNewStyleSpinner.cs

@@ -82,7 +82,7 @@ namespace osu.Game.Rulesets.Osu.Skinning.Legacy
 
             var topProvider = source.FindProvider(s => s.GetTexture("spinner-top") != null);
 
-            if (topProvider is LegacySkinTransformer transformer && !(transformer.Skin is DefaultLegacySkin))
+            if (topProvider is ISkinTransformer transformer && !(transformer.Skin is DefaultLegacySkin))
             {
                 AddInternal(ApproachCircle = new Sprite
                 {

osu.Game.Rulesets.Osu/Skinning/Legacy/LegacySmokeSegment.cs

@@ -0,0 +1,19 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Game.Skinning;
+
+namespace osu.Game.Rulesets.Osu.Skinning.Legacy
+{
+    public class LegacySmokeSegment : SmokeSegment
+    {
+        [BackgroundDependencyLoader]
+        private void load(ISkinSource skin)
+        {
+            base.LoadComplete();
+
+            Texture = skin.GetTexture("cursor-smoke");
+        }
+    }
+}

osu.Game.Rulesets.Osu/Skinning/Legacy/OsuLegacySkinTransformer.cs

@@ -106,6 +106,12 @@ namespace osu.Game.Rulesets.Osu.Skinning.Legacy
 
                         return null;
 
+                    case OsuSkinComponents.CursorSmoke:
+                        if (GetTexture("cursor-smoke") != null)
+                            return new LegacySmokeSegment();
+
+                        return null;
+
                     case OsuSkinComponents.HitCircleText:
                         if (!this.HasFont(LegacyFont.HitCircle))
                             return null;

osu.Game.Rulesets.Osu/Skinning/SmokeSegment.cs

@@ -0,0 +1,366 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Primitives;
+using osu.Framework.Graphics.Rendering;
+using osu.Framework.Graphics.Rendering.Vertices;
+using osu.Framework.Graphics.Shaders;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Utils;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Skinning
+{
+    public abstract class SmokeSegment : Drawable, ITexturedShaderDrawable
+    {
+        private const int max_point_count = 18_000;
+
+        // fade anim values
+        private const double initial_fade_out_duration = 4000;
+
+        private const double re_fade_in_speed = 3;
+        private const double re_fade_in_duration = 50;
+
+        private const double final_fade_out_speed = 2;
+        private const double final_fade_out_duration = 8000;
+
+        private const float initial_alpha = 0.6f;
+        private const float re_fade_in_alpha = 1f;
+
+        private readonly int rotationSeed = RNG.Next();
+
+        // scale anim values
+        private const double scale_duration = 1200;
+
+        private const float initial_scale = 0.65f;
+        private const float final_scale = 1f;
+
+        // rotation anim values
+        private const double rotation_duration = 500;
+
+        private const float max_rotation = 0.25f;
+
+        public IShader? TextureShader { get; private set; }
+        public IShader? RoundedTextureShader { get; private set; }
+
+        protected Texture? Texture { get; set; }
+
+        private float radius => Texture?.DisplayWidth * 0.165f ?? 3;
+
+        protected readonly List<SmokePoint> SmokePoints = new List<SmokePoint>();
+
+        private float pointInterval => radius * 7f / 8;
+
+        private double smokeStartTime { get; set; } = double.MinValue;
+
+        private double smokeEndTime { get; set; } = double.MaxValue;
+
+        private float totalDistance;
+        private Vector2? lastPosition;
+
+        [BackgroundDependencyLoader]
+        private void load(ShaderManager shaders)
+        {
+            RoundedTextureShader = shaders.Load(VertexShaderDescriptor.TEXTURE_2, FragmentShaderDescriptor.TEXTURE_ROUNDED);
+            TextureShader = shaders.Load(VertexShaderDescriptor.TEXTURE_2, FragmentShaderDescriptor.TEXTURE);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            RelativeSizeAxes = Axes.Both;
+
+            LifetimeStart = smokeStartTime = Time.Current;
+
+            totalDistance = pointInterval;
+        }
+
+        private Vector2 nextPointDirection()
+        {
+            float angle = RNG.NextSingle(0, 2 * MathF.PI);
+            return new Vector2(MathF.Sin(angle), -MathF.Cos(angle));
+        }
+
+        public void AddPosition(Vector2 position, double time)
+        {
+            lastPosition ??= position;
+
+            float delta = (position - (Vector2)lastPosition).LengthFast;
+            totalDistance += delta;
+            int count = (int)(totalDistance / pointInterval);
+
+            if (count > 0)
+            {
+                Vector2 increment = position - (Vector2)lastPosition;
+                increment.NormalizeFast();
+
+                Vector2 pointPos = (pointInterval - (totalDistance - delta)) * increment + (Vector2)lastPosition;
+                increment *= pointInterval;
+
+                if (SmokePoints.Count > 0 && SmokePoints[^1].Time > time)
+                {
+                    int index = ~SmokePoints.BinarySearch(new SmokePoint { Time = time }, new SmokePoint.UpperBoundComparer());
+                    SmokePoints.RemoveRange(index, SmokePoints.Count - index);
+                }
+
+                totalDistance %= pointInterval;
+
+                for (int i = 0; i < count; i++)
+                {
+                    SmokePoints.Add(new SmokePoint
+                    {
+                        Position = pointPos,
+                        Time = time,
+                        Direction = nextPointDirection(),
+                    });
+
+                    pointPos += increment;
+                }
+
+                Invalidate(Invalidation.DrawNode);
+            }
+
+            lastPosition = position;
+
+            if (SmokePoints.Count >= max_point_count)
+                FinishDrawing(time);
+        }
+
+        public void FinishDrawing(double time)
+        {
+            smokeEndTime = time;
+
+            double initialFadeOutDurationTrunc = Math.Min(initial_fade_out_duration, smokeEndTime - smokeStartTime);
+            LifetimeEnd = smokeEndTime + final_fade_out_duration + initialFadeOutDurationTrunc / re_fade_in_speed + initialFadeOutDurationTrunc / final_fade_out_speed;
+        }
+
+        protected override DrawNode CreateDrawNode() => new SmokeDrawNode(this);
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Invalidate(Invalidation.DrawNode);
+        }
+
+        protected struct SmokePoint
+        {
+            public Vector2 Position;
+            public double Time;
+            public Vector2 Direction;
+
+            public struct UpperBoundComparer : IComparer<SmokePoint>
+            {
+                public int Compare(SmokePoint x, SmokePoint target)
+                {
+                    // By returning -1 when the target value is equal to x, guarantees that the
+                    // element at BinarySearch's returned index will always be the first element
+                    // larger. Since 0 is never returned, the target is never "found", so the return
+                    // value will be the index's complement.
+
+                    return x.Time > target.Time ? 1 : -1;
+                }
+            }
+        }
+
+        protected class SmokeDrawNode : TexturedShaderDrawNode
+        {
+            protected new SmokeSegment Source => (SmokeSegment)base.Source;
+
+            protected double SmokeStartTime { get; private set; }
+            protected double SmokeEndTime { get; private set; }
+            protected double CurrentTime { get; private set; }
+
+            private readonly List<SmokePoint> points = new List<SmokePoint>();
+            private IVertexBatch<TexturedVertex2D>? quadBatch;
+            private float radius;
+            private Vector2 drawSize;
+            private Texture? texture;
+
+            // anim calculation vars (color, scale, direction)
+            private double initialFadeOutDurationTrunc;
+            private double firstVisiblePointTime;
+
+            private double initialFadeOutTime;
+            private double reFadeInTime;
+            private double finalFadeOutTime;
+
+            private Random rotationRNG = new Random();
+
+            public SmokeDrawNode(ITexturedShaderDrawable source)
+                : base(source)
+            {
+            }
+
+            public override void ApplyState()
+            {
+                base.ApplyState();
+
+                points.Clear();
+                points.AddRange(Source.SmokePoints);
+
+                radius = Source.radius;
+                drawSize = Source.DrawSize;
+                texture = Source.Texture;
+
+                SmokeStartTime = Source.smokeStartTime;
+                SmokeEndTime = Source.smokeEndTime;
+                CurrentTime = Source.Clock.CurrentTime;
+
+                rotationRNG = new Random(Source.rotationSeed);
+
+                initialFadeOutDurationTrunc = Math.Min(initial_fade_out_duration, SmokeEndTime - SmokeStartTime);
+                firstVisiblePointTime = SmokeEndTime - initialFadeOutDurationTrunc;
+
+                initialFadeOutTime = CurrentTime;
+                reFadeInTime = CurrentTime - initialFadeOutDurationTrunc - firstVisiblePointTime * (1 - 1 / re_fade_in_speed);
+                finalFadeOutTime = CurrentTime - initialFadeOutDurationTrunc - firstVisiblePointTime * (1 - 1 / final_fade_out_speed);
+            }
+
+            public sealed override void Draw(IRenderer renderer)
+            {
+                base.Draw(renderer);
+
+                if (points.Count == 0)
+                    return;
+
+                quadBatch ??= renderer.CreateQuadBatch<TexturedVertex2D>(max_point_count / 10, 10);
+                texture ??= renderer.WhitePixel;
+                RectangleF textureRect = texture.GetTextureRect();
+
+                var shader = GetAppropriateShader(renderer);
+
+                renderer.SetBlend(BlendingParameters.Additive);
+                renderer.PushLocalMatrix(DrawInfo.Matrix);
+
+                shader.Bind();
+                texture.Bind();
+
+                foreach (var point in points)
+                    drawPointQuad(point, textureRect);
+
+                shader.Unbind();
+                renderer.PopLocalMatrix();
+            }
+
+            protected Color4 ColourAtPosition(Vector2 localPos) => DrawColourInfo.Colour.HasSingleColour
+                ? ((SRGBColour)DrawColourInfo.Colour).Linear
+                : DrawColourInfo.Colour.Interpolate(Vector2.Divide(localPos, drawSize)).Linear;
+
+            protected virtual Color4 PointColour(SmokePoint point)
+            {
+                var color = Color4.White;
+
+                double timeDoingInitialFadeOut = Math.Min(initialFadeOutTime, SmokeEndTime) - point.Time;
+
+                if (timeDoingInitialFadeOut > 0)
+                {
+                    float fraction = Math.Clamp((float)(timeDoingInitialFadeOut / initial_fade_out_duration), 0, 1);
+                    color.A = (1 - fraction) * initial_alpha;
+                }
+
+                if (color.A > 0)
+                {
+                    double timeDoingReFadeIn = reFadeInTime - point.Time / re_fade_in_speed;
+                    double timeDoingFinalFadeOut = finalFadeOutTime - point.Time / final_fade_out_speed;
+
+                    if (timeDoingFinalFadeOut > 0)
+                    {
+                        float fraction = Math.Clamp((float)(timeDoingFinalFadeOut / final_fade_out_duration), 0, 1);
+                        fraction = MathF.Pow(fraction, 5);
+                        color.A = (1 - fraction) * re_fade_in_alpha;
+                    }
+                    else if (timeDoingReFadeIn > 0)
+                    {
+                        float fraction = Math.Clamp((float)(timeDoingReFadeIn / re_fade_in_duration), 0, 1);
+                        fraction = 1 - MathF.Pow(1 - fraction, 5);
+                        color.A = fraction * (re_fade_in_alpha - color.A) + color.A;
+                    }
+                }
+
+                return color;
+            }
+
+            protected virtual float PointScale(SmokePoint point)
+            {
+                double timeDoingScale = CurrentTime - point.Time;
+                float fraction = Math.Clamp((float)(timeDoingScale / scale_duration), 0, 1);
+                fraction = 1 - MathF.Pow(1 - fraction, 5);
+                return fraction * (final_scale - initial_scale) + initial_scale;
+            }
+
+            protected virtual Vector2 PointDirection(SmokePoint point)
+            {
+                float initialAngle = MathF.Atan2(point.Direction.Y, point.Direction.X);
+                float finalAngle = initialAngle + nextRotation();
+
+                double timeDoingRotation = CurrentTime - point.Time;
+                float fraction = Math.Clamp((float)(timeDoingRotation / rotation_duration), 0, 1);
+                fraction = 1 - MathF.Pow(1 - fraction, 5);
+                float angle = fraction * (finalAngle - initialAngle) + initialAngle;
+
+                return new Vector2(MathF.Sin(angle), -MathF.Cos(angle));
+            }
+
+            private float nextRotation() => max_rotation * ((float)rotationRNG.NextDouble() * 2 - 1);
+
+            private void drawPointQuad(SmokePoint point, RectangleF textureRect)
+            {
+                Debug.Assert(quadBatch != null);
+
+                var colour = PointColour(point);
+                float scale = PointScale(point);
+                var dir = PointDirection(point);
+                var ortho = dir.PerpendicularLeft;
+
+                if (colour.A == 0 || scale == 0)
+                    return;
+
+                var localTopLeft = point.Position + (radius * scale * (-ortho - dir));
+                var localTopRight = point.Position + (radius * scale * (-ortho + dir));
+                var localBotLeft = point.Position + (radius * scale * (ortho - dir));
+                var localBotRight = point.Position + (radius * scale * (ortho + dir));
+
+                quadBatch.Add(new TexturedVertex2D
+                {
+                    Position = localTopLeft,
+                    TexturePosition = textureRect.TopLeft,
+                    Colour = Color4Extensions.Multiply(ColourAtPosition(localTopLeft), colour),
+                });
+                quadBatch.Add(new TexturedVertex2D
+                {
+                    Position = localTopRight,
+                    TexturePosition = textureRect.TopRight,
+                    Colour = Color4Extensions.Multiply(ColourAtPosition(localTopRight), colour),
+                });
+                quadBatch.Add(new TexturedVertex2D
+                {
+                    Position = localBotRight,
+                    TexturePosition = textureRect.BottomRight,
+                    Colour = Color4Extensions.Multiply(ColourAtPosition(localBotRight), colour),
+                });
+                quadBatch.Add(new TexturedVertex2D
+                {
+                    Position = localBotLeft,
+                    TexturePosition = textureRect.BottomLeft,
+                    Colour = Color4Extensions.Multiply(ColourAtPosition(localBotLeft), colour),
+                });
+            }
+
+            protected override void Dispose(bool isDisposing)
+            {
+                base.Dispose(isDisposing);
+                quadBatch?.Dispose();
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/UI/OsuPlayfield.cs

@@ -54,6 +54,7 @@ namespace osu.Game.Rulesets.Osu.UI
             InternalChildren = new Drawable[]
             {
                 playfieldBorder = new PlayfieldBorder { RelativeSizeAxes = Axes.Both },
+                new SmokeContainer { RelativeSizeAxes = Axes.Both },
                 spinnerProxies = new ProxyContainer { RelativeSizeAxes = Axes.Both },
                 FollowPoints = new FollowPointRenderer { RelativeSizeAxes = Axes.Both },
                 judgementLayer = new JudgementContainer<DrawableOsuJudgement> { RelativeSizeAxes = Axes.Both },

osu.Game.Rulesets.Osu/UI/SmokeContainer.cs

@@ -0,0 +1,77 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Input;
+using osu.Framework.Input.Bindings;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Osu.Skinning;
+using osu.Game.Rulesets.Osu.Skinning.Default;
+using osu.Game.Skinning;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.UI
+{
+    /// <summary>
+    /// Manages smoke trails generated from user input.
+    /// </summary>
+    public class SmokeContainer : Container, IRequireHighFrequencyMousePosition, IKeyBindingHandler<OsuAction>
+    {
+        private SmokeSkinnableDrawable? currentSegmentSkinnable;
+
+        private Vector2 lastMousePosition;
+
+        public override bool ReceivePositionalInputAt(Vector2 _) => true;
+
+        public bool OnPressed(KeyBindingPressEvent<OsuAction> e)
+        {
+            if (e.Action == OsuAction.Smoke)
+            {
+                AddInternal(currentSegmentSkinnable = new SmokeSkinnableDrawable(new OsuSkinComponent(OsuSkinComponents.CursorSmoke), _ => new DefaultSmokeSegment()));
+
+                // Add initial position immediately.
+                addPosition();
+                return true;
+            }
+
+            return false;
+        }
+
+        public void OnReleased(KeyBindingReleaseEvent<OsuAction> e)
+        {
+            if (e.Action == OsuAction.Smoke)
+            {
+                if (currentSegmentSkinnable?.Drawable is SmokeSegment segment)
+                {
+                    segment.FinishDrawing(Time.Current);
+                    currentSegmentSkinnable = null;
+                }
+            }
+        }
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
+        {
+            lastMousePosition = e.MousePosition;
+            addPosition();
+
+            return base.OnMouseMove(e);
+        }
+
+        private void addPosition() => (currentSegmentSkinnable?.Drawable as SmokeSegment)?.AddPosition(lastMousePosition, Time.Current);
+
+        private class SmokeSkinnableDrawable : SkinnableDrawable
+        {
+            public override bool RemoveWhenNotAlive => true;
+
+            public override double LifetimeStart => Drawable.LifetimeStart;
+            public override double LifetimeEnd => Drawable.LifetimeEnd;
+
+            public SmokeSkinnableDrawable(ISkinComponent component, Func<ISkinComponent, Drawable>? defaultImplementation = null, ConfineMode confineMode = ConfineMode.NoScaling)
+                : base(component, defaultImplementation, confineMode)
+            {
+            }
+        }
+    }
+}