Fur als 4. Paint-Map + Ziel-Opacity-Blend

Fur wird die vierte kanonische Paint-Map (RGB=Farbe, A=Länge). Integration
über Seed (kahl), GPU/CPU-Paint, Undo, Netzwerk-Sync, Persistence (fur.png,
v6) und Live-RT-Hook im FurShellRenderer. HUD-Binding (Toggle/Picker/Alpha)
aktiviert. Fur-Alpha lerpt jetzt zu einer Ziel-Opacity (Slider_FurOpacity)
statt additiv Richtung 1 zu akkumulieren (zwei Brush-Passes: Fade + Deposit).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scripts/Components/UI/PaintHud/PaintHud.cs

@@ -34,14 +34,17 @@ public partial class PaintHud : MonoBehaviour
     private const string PanelEmission = "Panel_Emission";
     private const string PanelBrushSize = "Panel_BrushSize";
     private const string PanelPaintings = "Panel_Paintings";
+    private const string PanelFur = "Panel_Fur";
     private const string ToggleAlbedo = "Toggle_Albedo";
     private const string ToggleMetallicSmoothness = "Toggle_MetallicSmoothness";
     private const string ToggleOcclusion = "Toggle_Occlusion";
     private const string ToggleEmission = "Toggle_Emission";
     private const string ToggleSpray = "Toggle_Spray";
     private const string TogglePipette = "Toggle_Pipette";
+    private const string ToggleFur = "Toggle_Fur";
     private const string PickerAlbedo = "Picker_Albedo";
     private const string PickerEmission = "Picker_Emission";
+    private const string PickerFur = "Picker_Fur";
     private const string SliderAlbedoAlpha = "Slider_AlbedoAlpha";
     private const string SliderEmissionAlpha = "Slider_EmissionAlpha";
     private const string SliderMetallic = "Slider_Metallic";
@@ -62,6 +65,8 @@ public partial class PaintHud : MonoBehaviour
     private const string SliderOcclusionThreshold = "Slider_OcclusionThreshold";
     private const string SliderNormalIntensity = "Slider_NormalIntensity";
     private const string SliderParallaxIntensity = "Slider_ParallaxIntensity";
+    private const string SliderFurAlpha = "Slider_FurAlpha";
+    private const string SliderFurOpacity = "Slider_FurOpacity";
     private const string MaskSelector = "MaskSelector";
     private const string MaskSwatchPrefix = "MaskSwatch_";
 
@@ -75,7 +80,8 @@ public partial class PaintHud : MonoBehaviour
         PanelBrushSize,
         PanelSpray,
         PanelGeneral,
-        PanelPaintings
+        PanelPaintings,
+        PanelFur
     };
 
     private GameObject _panel;
@@ -209,12 +215,14 @@ public partial class PaintHud : MonoBehaviour
         WireToggle(panel, ToggleEmission, painter && painter.paintEmission, v => { if (painter) painter.paintEmission = v; });
         WireToggle(panel, ToggleSpray, painter && painter.spray, v => { if (painter) painter.spray = v; });
         WireToggle(panel, TogglePipette, painter && painter.pipette, v => { if (painter) painter.pipette = v; });
+        WireToggle(panel, ToggleFur, painter && painter.fur, v => { if (painter) painter.fur = v; });
 
         WirePanelFade(panel, PanelAlbedo, ToggleAlbedo);
         WirePanelFade(panel, PanelMetallicSmoothness, ToggleMetallicSmoothness);
         WirePanelFade(panel, PanelOcclusion, ToggleOcclusion);
         WirePanelFade(panel, PanelEmission, ToggleEmission);
         WirePanelFade(panel, PanelSpray, ToggleSpray);
+        WirePanelFade(panel, PanelFur, ToggleFur);
 
         // Picker drives only RGB (keeping the painter's current alpha); a standalone slider drives alpha.
         WirePicker(panel, PickerAlbedo, painter ? painter.brushColor : Color.red,
@@ -255,6 +263,13 @@ public partial class PaintHud : MonoBehaviour
         WireSlider(panel, SliderNormalIntensity, painter ? painter.HeightNormalIntensity : 1.4f, v => { if (painter) painter.HeightNormalIntensity = v; });
         WireSlider(panel, SliderParallaxIntensity, painter ? painter.ParallaxIntensity : 1f, v => { if (painter) painter.ParallaxIntensity = v; });
 
+        WirePicker(panel, PickerFur, painter ? painter.furColor : Color.blue,
+            c => { if (painter) painter.furColor = WithRgb(painter.furColor, c); });
+        WireSlider(panel, SliderFurAlpha, painter ? painter.furColor.a : .6f,
+            v => { if (painter) painter.furColor = WithAlpha(painter.furColor, v); });
+        WireSlider(panel, SliderFurOpacity, painter ? painter.furOpacity : 1f,
+            v => { if (painter) painter.furOpacity = v; });
+
         foreach (var name in DraggablePanels)
             MakeDraggable(panel, name);
     }
@@ -276,11 +291,15 @@ public partial class PaintHud : MonoBehaviour
         SetToggle(panel, ToggleEmission, painter.paintEmission);
         SetToggle(panel, ToggleSpray, painter.spray);
         SetToggle(panel, TogglePipette, painter.pipette);
+        SetToggle(panel, ToggleFur, painter.fur);
 
         SetPicker(panel, PickerAlbedo, painter.brushColor);
         SetPicker(panel, PickerEmission, painter.emissionColor);
+        SetPicker(panel, PickerFur, painter.furColor);
         SetSlider(panel, SliderAlbedoAlpha, painter.brushColor.a);
         SetSlider(panel, SliderEmissionAlpha, painter.emissionColor.a);
+        SetSlider(panel, SliderFurAlpha, painter.furColor.a);
+        SetSlider(panel, SliderFurOpacity, painter.furOpacity);
 
         SetSlider(panel, SliderMetallic, painter.metallic);
         SetSlider(panel, SliderSmoothness, painter.smoothness);