[增加]1. 增加透明通道的导入

Author: AlianBlank

Editor/UITextureAssetPostprocessor.cs

@@ -19,6 +19,10 @@ void OnPreprocessTexture()
                 {
                     textureImporter.mipmapEnabled = false;
                 }
+
+                textureImporter.alphaSource = TextureImporterAlphaSource.FromInput;
+                textureImporter.alphaIsTransparency = true;
+
             }
         }
     }