Add overlay layer to player by proxying

osu.Game/Screens/Play/DimmableStoryboard.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
 using osu.Game.Graphics.Containers;
 using osu.Game.Storyboards;
 using osu.Game.Storyboards.Drawables;
@@ -13,6 +14,8 @@ namespace osu.Game.Screens.Play
     /// </summary>
     public class DimmableStoryboard : UserDimContainer
     {
+        public Container OverlayLayerContainer;
+
         private readonly Storyboard storyboard;
         private DrawableStoryboard drawableStoryboard;
 
@@ -24,6 +27,8 @@ namespace osu.Game.Screens.Play
         [BackgroundDependencyLoader]
         private void load()
         {
+            Add(OverlayLayerContainer = new Container());
+
             initializeStoryboard(false);
         }
 
@@ -46,9 +51,15 @@ namespace osu.Game.Screens.Play
             drawableStoryboard = storyboard.CreateDrawable();
 
             if (async)
-                LoadComponentAsync(drawableStoryboard, Add);
+                LoadComponentAsync(drawableStoryboard, onStoryboardCreated);
             else
-                Add(drawableStoryboard);
+                onStoryboardCreated(drawableStoryboard);
+        }
+
+        private void onStoryboardCreated(DrawableStoryboard storyboard)
+        {
+            Add(storyboard);
+            OverlayLayerContainer.Add(storyboard.OverlayLayer.CreateProxy());
         }
     }
 }

osu.Game/Screens/Play/Player.cs

@@ -264,6 +264,7 @@ namespace osu.Game.Screens.Play
         {
             target.AddRange(new[]
             {
+                DimmableStoryboard.OverlayLayerContainer.CreateProxy(),
                 BreakOverlay = new BreakOverlay(working.Beatmap.BeatmapInfo.LetterboxInBreaks, ScoreProcessor)
                 {
                     Clock = DrawableRuleset.FrameStableClock,