Add playfield bounds box with toggle and dim slider

osu.Game/Configuration/OsuConfigManager.cs

@@ -99,6 +99,9 @@ namespace osu.Game.Configuration
 
             Set(OsuSetting.IncreaseFirstObjectVisibility, true);
 
+            Set(OsuSetting.ShowPlayfieldArea, false);
+            Set(OsuSetting.PlayfieldAreaDimLevel, 0.1, 0, 1, 0.01);
+
             // Update
             Set(OsuSetting.ReleaseStream, ReleaseStream.Lazer);
 
@@ -227,6 +230,8 @@ namespace osu.Game.Configuration
         IntroSequence,
         UIHoldActivationDelay,
         HitLighting,
-        MenuBackgroundSource
+        MenuBackgroundSource,
+        ShowPlayfieldArea,
+        PlayfieldAreaDimLevel
     }
 }

osu.Game/Overlays/Settings/Sections/Gameplay/GeneralSettings.cs

@@ -76,7 +76,19 @@ namespace osu.Game.Overlays.Settings.Sections.Gameplay
                 {
                     LabelText = "Score display mode",
                     Bindable = config.GetBindable<ScoringMode>(OsuSetting.ScoreDisplayMode)
-                }
+                },
+                new SettingsCheckbox
+                {
+                    LabelText = "Show playfield area",
+                    Bindable = config.GetBindable<bool>(OsuSetting.ShowPlayfieldArea)
+                },
+                new SettingsSlider<double>
+                {
+                    LabelText = "Playfield area dim",
+                    Bindable = config.GetBindable<double>(OsuSetting.PlayfieldAreaDimLevel),
+                    KeyboardStep = 0.01f,
+                    DisplayAsPercentage = true
+                },
             };
         }
     }

osu.Game/Rulesets/UI/Playfield.cs

@@ -12,6 +12,9 @@ using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Rulesets.Mods;
 using osuTK;
+using osu.Framework.Graphics.Shapes;
+using osuTK.Graphics;
+using osu.Game.Configuration;
 
 namespace osu.Game.Rulesets.UI
 {
@@ -51,6 +54,10 @@ namespace osu.Game.Rulesets.UI
         /// </summary>
         public readonly BindableBool DisplayJudgements = new BindableBool(true);
 
+        private Bindable<bool> showPlayfieldArea;
+        private Bindable<double> playfieldAreaDimLevel;
+        private Box playfieldArea;
+
         /// <summary>
         /// Creates a new <see cref="Playfield"/>.
         /// </summary>
@@ -65,7 +72,7 @@ namespace osu.Game.Rulesets.UI
         private IReadOnlyList<Mod> mods { get; set; }
 
         [BackgroundDependencyLoader]
-        private void load()
+        private void load(OsuConfigManager config)
         {
             Cursor = CreateCursor();
 
@@ -76,6 +83,38 @@ namespace osu.Game.Rulesets.UI
 
                 AddInternal(Cursor);
             }
+
+            showPlayfieldArea = config.GetBindable<bool>(OsuSetting.ShowPlayfieldArea);
+            playfieldAreaDimLevel = config.GetBindable<double>(OsuSetting.PlayfieldAreaDimLevel);
+            showPlayfieldArea.ValueChanged += _ => UpdateVisuals();
+            playfieldAreaDimLevel.ValueChanged += _ => UpdateVisuals();
+            UpdateVisuals();
+        }
+        protected virtual void UpdateVisuals()
+        {
+            if(playfieldArea == null)
+            {
+                if (showPlayfieldArea.Value)
+                {
+                    AddInternal(playfieldArea = new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = Color4.White,
+                        Alpha = (float)playfieldAreaDimLevel.Value,
+                    });
+                }
+            }
+            else
+            {
+                if (showPlayfieldArea.Value)
+                {
+                    playfieldArea.Alpha = (float)playfieldAreaDimLevel.Value;
+                }
+                else
+                {
+                    playfieldArea.Alpha = 0;
+                }
+            }
         }
 
         /// <summary>

osu.Game/Screens/Play/PlayerSettings/VisualSettings.cs

@@ -14,9 +14,11 @@ namespace osu.Game.Screens.Play.PlayerSettings
 
         private readonly PlayerSliderBar<double> dimSliderBar;
         private readonly PlayerSliderBar<double> blurSliderBar;
+        private readonly PlayerSliderBar<double> playfieldAreaDimSliderBar;
         private readonly PlayerCheckbox showStoryboardToggle;
         private readonly PlayerCheckbox beatmapSkinsToggle;
         private readonly PlayerCheckbox beatmapHitsoundsToggle;
+        private readonly PlayerCheckbox showPlayfieldAreaToggle;
 
         public VisualSettings()
         {
@@ -39,12 +41,21 @@ namespace osu.Game.Screens.Play.PlayerSettings
                     DisplayAsPercentage = true
                 },
                 new OsuSpriteText
+                {
+                    Text = "Playfieldd area dim:"
+                },
+                playfieldAreaDimSliderBar = new PlayerSliderBar<double>
+                {
+                    DisplayAsPercentage = true
+                },
+                new OsuSpriteText
                 {
                     Text = "Toggles:"
                 },
                 showStoryboardToggle = new PlayerCheckbox { LabelText = "Storyboard / Video" },
                 beatmapSkinsToggle = new PlayerCheckbox { LabelText = "Beatmap skins" },
-                beatmapHitsoundsToggle = new PlayerCheckbox { LabelText = "Beatmap hitsounds" }
+                beatmapHitsoundsToggle = new PlayerCheckbox { LabelText = "Beatmap hitsounds" },
+                showPlayfieldAreaToggle = new PlayerCheckbox { LabelText = "Show playfield area" }
             };
         }
 
@@ -53,9 +64,11 @@ namespace osu.Game.Screens.Play.PlayerSettings
         {
             dimSliderBar.Bindable = config.GetBindable<double>(OsuSetting.DimLevel);
             blurSliderBar.Bindable = config.GetBindable<double>(OsuSetting.BlurLevel);
+            playfieldAreaDimSliderBar.Bindable = config.GetBindable<double>(OsuSetting.PlayfieldAreaDimLevel);
             showStoryboardToggle.Current = config.GetBindable<bool>(OsuSetting.ShowStoryboard);
             beatmapSkinsToggle.Current = config.GetBindable<bool>(OsuSetting.BeatmapSkins);
             beatmapHitsoundsToggle.Current = config.GetBindable<bool>(OsuSetting.BeatmapHitsounds);
+            showPlayfieldAreaToggle.Current = config.GetBindable<bool>(OsuSetting.ShowPlayfieldArea);
         }
     }
 }