材质修改

Assets/Shaders/Editor/UIMaskDrawers.cs

@@ -50,20 +50,48 @@ public abstract class UIMaskEnumDrawer : MaterialPropertyDrawer
     }
 }
 
-// 混合模式：加色 / 普通混合
-// 数值对应 UnityEngine.Rendering.BlendMode：SrcAlpha=5, One=1, OneMinusSrcAlpha=10
+// 混合模式：Additive / Alpha / Alpha Premultiplied / Opaque
+// 数值对应 UnityEngine.Rendering.BlendMode：SrcAlpha=5, One=1, OneMinusSrcAlpha=10, Zero=0
+// Opaque 会同时打开 ZWrite（不透明需要写深度），其余模式 ZWrite = 0
 public class UIMaskBlendMode : UIMaskEnumDrawer
 {
-    private static readonly string[] Items = { "Additive", "AlphaBlend" };
+    private static readonly string[] Items = { "Additive", "Alpha", "Alpha Premultiplied", "Opaque" };
 
     protected override string[] Options => Items;
 
     protected override void Apply(MaterialEditor editor, int index)
     {
-        SetValue(editor, "_SrcBlend", (float)UnityEngine.Rendering.BlendMode.SrcAlpha);
-        SetValue(editor, "_DstBlend", index == 0
-            ? (float)UnityEngine.Rendering.BlendMode.One
-            : (float)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
+        const float srcAlpha = (float)UnityEngine.Rendering.BlendMode.SrcAlpha;                 // 5
+        const float one = (float)UnityEngine.Rendering.BlendMode.One;                           // 1
+        const float oneMinusSrcAlpha = (float)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha; // 10
+        const float zero = (float)UnityEngine.Rendering.BlendMode.Zero;                         // 0
+
+        switch (index)
+        {
+            case 1: // Alpha：标准透明混合
+                SetValue(editor, "_SrcBlend", srcAlpha);
+                SetValue(editor, "_DstBlend", oneMinusSrcAlpha);
+                SetValue(editor, "_ZWrite", 0f);
+                break;
+
+            case 2: // Alpha Premultiplied：颜色已预乘 alpha，源因子用 One
+                SetValue(editor, "_SrcBlend", one);
+                SetValue(editor, "_DstBlend", oneMinusSrcAlpha);
+                SetValue(editor, "_ZWrite", 0f);
+                break;
+
+            case 3: // Opaque：不混合 + 写深度
+                SetValue(editor, "_SrcBlend", one);
+                SetValue(editor, "_DstBlend", zero);
+                SetValue(editor, "_ZWrite", 1f);
+                break;
+
+            default: // Additive：SrcAlpha + One
+                SetValue(editor, "_SrcBlend", srcAlpha);
+                SetValue(editor, "_DstBlend", one);
+                SetValue(editor, "_ZWrite", 0f);
+                break;
+        }
     }
 }