diff --git a/packages/render-assets/src/store.ts b/packages/render-assets/src/store.ts
index 125f302..c5c54fe 100644
--- a/packages/render-assets/src/store.ts
+++ b/packages/render-assets/src/store.ts
@@ -99,4 +99,8 @@ export class TextureStore implements ITextureStore {
     aliasOf(identifier: number): string | undefined {
         return this.aliasInvMap.get(identifier);
     }
+
+    identifierOf(alias: string): number | undefined {
+        return this.aliasMap.get(alias);
+    }
 }
diff --git a/packages/render-assets/src/streamComposer.ts b/packages/render-assets/src/streamComposer.ts
index c5143f6..222c5b5 100644
--- a/packages/render-assets/src/streamComposer.ts
+++ b/packages/render-assets/src/streamComposer.ts
@@ -110,7 +110,7 @@ export class TextureMaxRectsStreamComposer
         readonly maxWidth: number,
         readonly maxHeight: number,
         readonly padding: number,
-        options: IOption
+        options?: IOption
     ) {
         this.packer = new MaxRectsPacker<MaxRectsRectangle>(
             this.maxWidth,
diff --git a/packages/render-assets/src/types.ts b/packages/render-assets/src/types.ts
index 773e1d4..e076608 100644
--- a/packages/render-assets/src/types.ts
+++ b/packages/render-assets/src/types.ts
@@ -219,6 +219,12 @@ export interface ITextureStore {
      */
     fromAlias(alias: string): ITexture | null;
 
+    /**
+     * 根据贴图对象别名获取贴图对象 id
+     * @param alias 贴图对象别名
+     */
+    identifierOf(alias: string): number | undefined;
+
     /**
      * 根据贴图对象获取此贴图对象在此控制器中的 id，如果贴图不在此控制器，返回 `undefined`
      * @param texture 贴图对象