修改材质更换逻辑

Assets/Scripts/Actions/MatAction.cs

@@ -60,7 +60,22 @@ namespace QFramework
             int.TryParse(index, out matIndex);
             if (string.IsNullOrEmpty(matName) == false)
             {
-                mesh.materials[matIndex] = Resources.Load<Material>("Mat/" + matName);
+                //mesh.materials[matIndex].CopyMatchingPropertiesFromMaterial();
+                var mat = Resources.Load<Material>("Mat/" + matName);
+                var mats = new Material[mesh.materials.Length];
+                for (int i = 0; i < mesh.materials.Length; i++)
+                {
+                    if (i == matIndex)
+                    {
+                        mats[i] = mat;
+                    }
+                    else
+                    {
+                        mats[i] = mesh.materials[i];
+                    }
+                }
+
+                mesh.materials = mats;
             }
             if (mainTexture != null)
             {