diff --git a/inc/hgl/graph/MaterialRenderList.h b/inc/hgl/graph/MaterialRenderList.h
index 5dbbf549..9214e27a 100644
--- a/inc/hgl/graph/MaterialRenderList.h
+++ b/inc/hgl/graph/MaterialRenderList.h
@@ -102,7 +102,7 @@ protected:
     bool BindVAB(const MeshDataBuffer *,const uint);
 
     void ProcIndirectRender();
-    void Render(RenderItem *);
+    bool Render(RenderItem *);
 
 public:
 
diff --git a/inc/hgl/graph/RenderTask.h b/inc/hgl/graph/RenderTask.h
index ebcf6404..911f0629 100644
--- a/inc/hgl/graph/RenderTask.h
+++ b/inc/hgl/graph/RenderTask.h
@@ -41,8 +41,6 @@ namespace hgl::graph
         bool Set(IRenderTarget *rt);
         void Set(Camera *c){camera=c;}
 
-        void Restart();                             ///<复位数据，清空渲染列表
-
         bool RebuildRenderList(SceneNode *);
 
         bool IsEmpty()const;                        ///<是否是空的，不可渲染或是没啥可渲染的
diff --git a/src/SceneGraph/render/RenderTask.cpp b/src/SceneGraph/render/RenderTask.cpp
index c1f90211..05ec6548 100644
--- a/src/SceneGraph/render/RenderTask.cpp
+++ b/src/SceneGraph/render/RenderTask.cpp
@@ -42,14 +42,6 @@ namespace hgl::graph
         return(true);
     }
 
-    void RenderTask::Restart()
-    {
-        if(!render_list)
-            return;
-
-        render_list->Clear();
-    }
-
     bool RenderTask::RebuildRenderList(SceneNode *root)
     {
         if(!root)
@@ -58,7 +50,8 @@ namespace hgl::graph
         if(!render_list)
             return(false);
 
-        render_list->Clear();
+        //记往不需要也千万不要手动render_list->Clear，因为那会完全释放掉所有数据
+        //render_list->Expend会自己复位所有数据，但并不释放内存
         render_list->Expend(root);
 
         return(true);