diff --git a/example/LightBasic/BlinnPhongDirectionLight.cpp b/example/LightBasic/BlinnPhongDirectionLight.cpp
index a31cdc08..300dff56 100644
--- a/example/LightBasic/BlinnPhongDirectionLight.cpp
+++ b/example/LightBasic/BlinnPhongDirectionLight.cpp
@@ -64,7 +64,7 @@ private:
 
     bool InitVertexLumMP()
     {
-        mtl::Material3DCreateConfig cfg(device->GetDeviceAttribute(),"VertexLuminance3D",false,Prim::Lines);
+        mtl::Material3DCreateConfig cfg(device->GetDeviceAttribute(),"VertexLuminance3D",Prim::Lines);
 
         cfg.local_to_world=true;
 
@@ -92,9 +92,10 @@ private:
 
     bool InitBlinnPhongSunLightMP()
     {
-        mtl::Material3DCreateConfig cfg(device->GetDeviceAttribute(),"BlinnPhong3D",true,Prim::Triangles);
+        mtl::Material3DCreateConfig cfg(device->GetDeviceAttribute(),"BlinnPhong3D",Prim::Triangles);
 
         cfg.local_to_world=true;
+        cfg.material_instance=true;
 
         mtl_blinnphong=db->LoadMaterial("Std3D/BlinnPhong/SunLightPureColor",&cfg);
         if(!mtl_blinnphong)return(false);
diff --git a/inc/hgl/graph/VKCommandBuffer.h b/inc/hgl/graph/VKCommandBuffer.h
index 3e33f6a5..61349832 100644
--- a/inc/hgl/graph/VKCommandBuffer.h
+++ b/inc/hgl/graph/VKCommandBuffer.h
@@ -191,6 +191,15 @@ public: //draw
                                 void DrawIndexed        (const uint32_t index_count )                               {vkCmdDrawIndexed(cmd_buf,index_count,1,0,0,0);}
                                 void Draw               (const uint32_t vertex_count,const uint32_t instance_count) {vkCmdDraw(cmd_buf,vertex_count,instance_count,0,0);}
                                 void DrawIndexed        (const uint32_t index_count ,const uint32_t instance_count) {vkCmdDrawIndexed(cmd_buf,index_count,instance_count,0,0,0);}
+                                void DrawIndexed        (const uint32_t index_count ,const uint32_t instance_count,const uint32_t firstIndex,const int32_t vertexOffset,const uint32_t firstInstance) 
+                                {
+                                    vkCmdDrawIndexed(cmd_buf,
+                                                     index_count,
+                                                     instance_count,
+                                                     firstIndex,
+                                                     vertexOffset,
+                                                     firstInstance);
+                                }
 
 //    template<typename ...ARGS>  void Draw               (ARGS...args)                   {vkCmdDraw(cmd_buf,args...);}
 //    template<typename ...ARGS>  void DrawIndexed        (ARGS...args)                   {vkCmdDrawIndexed(cmd_buf,args...);}
diff --git a/src/SceneGraph/MaterialRenderList.cpp b/src/SceneGraph/MaterialRenderList.cpp
index 6c905ed9..572fee45 100644
--- a/src/SceneGraph/MaterialRenderList.cpp
+++ b/src/SceneGraph/MaterialRenderList.cpp
@@ -164,7 +164,7 @@ bool MaterialRenderList::BindVAB(const VertexInputData *vid,const DrawData *dd,c
     }
 
     if(assign_buffer) //L2W/MI分发组
-        vbo_list->Add(assign_buffer->GetVAB(),ASSIGN_VAB_STRIDE_BYTES*ri_index);
+        vbo_list->Add(assign_buffer->GetVAB(),0);//ASSIGN_VAB_STRIDE_BYTES*ri_index);
 
     //if(!vbo_list.IsFull()) //Joint组，暂未支持
     //{
@@ -222,19 +222,18 @@ void MaterialRenderList::Render(RenderItem *ri)
     {
         last_vid=ri->vid;
         last_dd=nullptr;
-    }
 
-    if(!ri->dd->Comp(last_dd))
-    {
         BindVAB(ri->vid,ri->dd,ri->first);
-        last_dd=ri->dd;
+        cmd_buf->BindIBO(ri->vid->ibo,0);
     }
 
     if(last_vid->ibo)
     {
-        cmd_buf->BindIBO(ri->vid->ibo,ri->dd->index_start);
         cmd_buf->DrawIndexed(ri->dd->index_count,
-                             ri->count);
+                             ri->count,
+                             ri->dd->index_start,
+                             ri->dd->vab_offset[0],
+                             ri->first);
     }
     else
     {
diff --git a/src/SceneGraph/Vulkan/VKRenderable.cpp b/src/SceneGraph/Vulkan/VKRenderable.cpp
index 280fd100..261a3e68 100644
--- a/src/SceneGraph/Vulkan/VKRenderable.cpp
+++ b/src/SceneGraph/Vulkan/VKRenderable.cpp
@@ -145,7 +145,7 @@ Renderable *CreateRenderable(Primitive *prim,MaterialInstance *mi,Pipeline *p)
             return(nullptr);
         }
 
-        dd->vab_offset[i]=vab_access->start*vif->stride;
+        dd->vab_offset[i]=vab_access->start;
         vid->vab_list[i]=vab_access->vab->GetBuffer();
         ++vif;
     }
diff --git a/src/ShaderGen/2d/Std2DMaterialLoader.cpp b/src/ShaderGen/2d/Std2DMaterialLoader.cpp
index e538ffcb..a90d1fd2 100644
--- a/src/ShaderGen/2d/Std2DMaterialLoader.cpp
+++ b/src/ShaderGen/2d/Std2DMaterialLoader.cpp
@@ -113,6 +113,9 @@ MaterialCreateInfo *LoadMaterialFromFile(const AnsiString &name,Material2DCreate
     if(!mfd)
         return nullptr;
 
+    if(mfd->mi.mi_bytes>0)
+        cfg->material_instance=true;
+
     cfg->shader_stage_flag_bit=mfd->shader_stage_flag_bit;
 
     Std2DMaterialLoader mtl(mfd,cfg);
diff --git a/src/ShaderGen/3d/Std3DMaterialLoader.cpp b/src/ShaderGen/3d/Std3DMaterialLoader.cpp
index f72008d0..eb7f80a5 100644
--- a/src/ShaderGen/3d/Std3DMaterialLoader.cpp
+++ b/src/ShaderGen/3d/Std3DMaterialLoader.cpp
@@ -114,6 +114,9 @@ MaterialCreateInfo *LoadMaterialFromFile(const AnsiString &name,Material3DCreate
     if(!mfd)
         return nullptr;
 
+    if(mfd->mi.mi_bytes>0)
+        cfg->material_instance=true;
+
     cfg->shader_stage_flag_bit=mfd->shader_stage_flag_bit;
 
     Std3DMaterialLoader mtl(mfd,cfg);