Paint-Partikel beim Malen: Emission pro Stamp, Scale = Brush-Radius, Farbe = Brush-Albedo mit Helligkeits-Streuung

- MeshPainter: Paint Particles Prefab, lazy Instanz, Play/Stop am Stroke, MinMaxGradient (Albedo +-25%/15% dunkel/hell)
- PaintSplatter.prefab + Paint Particle Material/Textur, Wiring am Player.prefab
- FurShellRenderer: Kill-Switch-Destroy nur im Play-Mode (Edit-Mode-Error beim Prefab-Load)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/Materials/Paint Particle.mat

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+    - _ColorAddSubDiff: {r: 0, g: 0, b: 0, a: 0}
+    - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
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Assets/Materials/Paint Particle.mat.meta

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Assets/Prefabs/PaintSplatter.prefab.meta

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Assets/Prefabs/Player.prefab

@@ -227,7 +227,7 @@ MonoBehaviour:
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   m_Name: 
   m_EditorClassIdentifier: Unity.Netcode.Runtime::Unity.Netcode.NetworkObject
-  GlobalObjectIdHash: 1963377418
+  GlobalObjectIdHash: 459555553
   InScenePlacedSourceGlobalObjectIdHash: 0
   DeferredDespawnTick: 0
   Ownership: 1
@@ -525,6 +525,7 @@ MonoBehaviour:
   cornerGuardMaxFraction: 0.7
   previewMode: 2
   previewOpacity: 1
+  paintParticlesPrefab: {fileID: 723043959019929999, guid: 129e63016225faa4cb3c3ec86a7f66e5, type: 3}
   textureSize: 512
   baseColor: {r: 0.8, g: 0.8, b: 0.8, a: 1}
   paddingTexels: 8
@@ -551,13 +552,16 @@ MonoBehaviour:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 8192868123569919240}
-  m_Enabled: 1
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   m_Script: {fileID: 11500000, guid: a3c62508e4154584680226a26d48f0af, type: 3}
   m_Name: 
   m_EditorClassIdentifier: Assembly-CSharp::Chameleon.Components.FurShellRenderer
   _furMaterial: {fileID: 2100000, guid: ea8336dff8223b241a672d9fab39e1fa, type: 2}
   _shellCount: 32
+  _lodStartDistance: 8
+  _lodEndDistance: 30
+  _lodMinShells: 8
   _shellLength: 8
   _density: 400
   _thickness: 3
@@ -576,6 +580,7 @@ MonoBehaviour:
   _furThreshold: 0
   _furSoftness: 0.5
   _strandSoftness: 0.3
+  _depthSortClip: 0.3
   _solidRoot: 0
   _windStrength: 0.002
   _windSpeed: 2
@@ -584,4 +589,7 @@ MonoBehaviour:
   _xrayFurStrength: 0.00001
   _shadowMode: 0
   _receiveShadows: 1
+  _renderingLayerMask:
+    serializedVersion: 0
+    m_Bits: 1
   _hideSourceRenderer: 1

Assets/Scripts/Components/FurShellRenderer.cs

@@ -153,7 +153,9 @@ namespace Chameleon.Components
                 return;
             }
 
-            Destroy(this);
+            // Play mode only: in the editor Awake also runs on edit-mode loads (LoadPrefabContents,
+            // [ExecuteAlways]) where Destroy is illegal - there OnEnable's disable path handles it.
+            if (Application.isPlaying) Destroy(this);
         }
 
         void OnEnable()

Assets/Scripts/Components/MeshPainter/MeshPainter.cs

@@ -328,6 +328,14 @@ public partial class MeshPainter : MonoBehaviour
     [Range(0f, 4f)]
     public float previewOpacity = 0.5f;
 
+    [Header("Paint particles")]
+    [Tooltip("Optional particle effect played at the brush while a stroke deposits paint. Instantiated " +
+             "once on first use. Author the system for brush world-radius 1 with scaling mode Hierarchy: " +
+             "the instance is scaled to the brush's world radius and tinted with the brush albedo color " +
+             "(Start Color is overwritten). +Z of the instance points along the surface normal.")]
+    public ParticleSystem paintParticlesPrefab;
+    private ParticleSystem _paintParticles;
+
     [Header("Canvas")]
     [Tooltip("Resolution of the paint textures (square).")]
     public int textureSize = 1024;
@@ -829,6 +837,7 @@ public partial class MeshPainter : MonoBehaviour
         if (!PaintingEnabled)
         {
             EndStrokeIfActive(); // finalize an in-progress stroke if the mode was left mid-paint
+            StopPaintParticles();
             _hasLastScreen = false;
             return;
         }
@@ -859,6 +868,7 @@ public partial class MeshPainter : MonoBehaviour
         if (!TryGetMouse(out bool pressed, out Vector2 screenPos))
         {
             StrokeInProgress = false;
+            StopPaintParticles();
             return;
         }
 
@@ -869,6 +879,7 @@ public partial class MeshPainter : MonoBehaviour
         // While the button is held on the paint path the hardware cursor is hidden entirely
         // (CursorController); the preview decal itself stays visible during the stroke.
         StrokeInProgress = pressed && !pipette;
+        if (!StrokeInProgress) StopPaintParticles();
 
         // Brush preview at the hover point.
         if (previewMode != BrushPreviewMode.Off && _previewMat && paintCamera)
@@ -975,11 +986,46 @@ public partial class MeshPainter : MonoBehaviour
         else UseResolvedStampMask();
 
         DrawBackendStamp(pLocal, radiusLocal, u, v, nLocal);
+        UpdatePaintParticles(pLocal, radiusLocal, nLocal);
 
         EmitStamp(pLocal, radiusLocal, u, v, nLocal);
         MarkStrokePainted(); // a stamp landed -> this stroke is undoable
     }
 
+    /// <summary>Moves/scales/tints the stroke particle effect at a landed stamp and keeps it playing.
+    /// Scale = brush world radius (author the prefab for radius 1, scaling mode Hierarchy), tint =
+    /// brush albedo color with a small per-particle random offset (alpha forced opaque - the brush
+    /// alpha is paint opacity, not particle fade).</summary>
+    private void UpdatePaintParticles(Vector3 pLocal, float radiusLocal, Vector3 nLocal)
+    {
+        if (!paintParticlesPrefab) return;
+        if (!_paintParticles)
+            _paintParticles = Instantiate(paintParticlesPrefab);
+
+        Transform t = _paintParticles.transform;
+        t.SetPositionAndRotation(transform.TransformPoint(pLocal),
+            Quaternion.LookRotation(transform.TransformDirection(nLocal)));
+        t.localScale = Vector3.one * transform.TransformVector(nLocal * radiusLocal).magnitude;
+
+        var main = _paintParticles.main;
+        Color c = brushColor;
+        c.a = 1f;
+        // Per-particle random tint offset around the albedo (darker <-> lighter).
+        Color dark = Color.Lerp(c, Color.black, 0.13f);
+        Color light = Color.Lerp(c, Color.white, 0.09f);
+        dark.a = light.a = 1f;
+        main.startColor = new ParticleSystem.MinMaxGradient(dark, light);
+
+        if (!_paintParticles.isPlaying) _paintParticles.Play();
+    }
+
+    /// <summary>Stops emitting stroke particles (already-spawned ones live out their lifetime).</summary>
+    private void StopPaintParticles()
+    {
+        if (_paintParticles && _paintParticles.isPlaying)
+            _paintParticles.Stop();
+    }
+
     /// <summary>
     /// True if a brush dab at this placement would wrap excessively around a corner: more than
     /// <see cref="cornerGuardMaxFraction"/> of its footprint sits on surface whose face normal
@@ -1235,6 +1281,7 @@ public partial class MeshPainter : MonoBehaviour
         if (_proceduralMask) Destroy(_proceduralMask);
         if (_previewMat) Destroy(_previewMat);
         if (_previewQuad) Destroy(_previewQuad);
+        if (_paintParticles) Destroy(_paintParticles.gameObject);
         TeardownSpray();
         TeardownCpu();
         TeardownGpu();

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