diff --git a/CMCore b/CMCore
index b7e0852b..3c382665 160000
--- a/CMCore
+++ b/CMCore
@@ -1 +1 @@
-Subproject commit b7e0852bd4b781abbb8a0815f5f456b0f810ce95
+Subproject commit 3c382665efe376af10b231f603344cfd8a5758e8
diff --git a/CMSceneGraph b/CMSceneGraph
index 3d69fc8b..1c8e4791 160000
--- a/CMSceneGraph
+++ b/CMSceneGraph
@@ -1 +1 @@
-Subproject commit 3d69fc8b48d844b9761ec7d9b1a357a5684a295e
+Subproject commit 1c8e479181ed9b4d2b59d794be8064f05818ea1c
diff --git a/example/common/VulkanAppFramework.h b/example/common/VulkanAppFramework.h
index d2204572..c48048d6 100644
--- a/example/common/VulkanAppFramework.h
+++ b/example/common/VulkanAppFramework.h
@@ -222,8 +222,8 @@ public:
             cb->BeginRenderPass();
                 cb->BindPipeline(ri->GetPipeline());
                 cb->BindDescriptorSets(ri->GetMaterial());
-                cb->BindRenderBuffer(ri->GetRenderBuffer());
-                cb->Draw(ri->GetRenderBuffer(),ri->GetRenderData());
+                cb->BindRenderBuffer(ri->GetDataBuffer());
+                cb->Draw(ri->GetDataBuffer(),ri->GetRenderData());
             cb->EndRenderPass();
         cb->End();
 
diff --git a/inc/hgl/graph/VKRenderable.h b/inc/hgl/graph/VKRenderable.h
index ffa3ccc8..91549443 100644
--- a/inc/hgl/graph/VKRenderable.h
+++ b/inc/hgl/graph/VKRenderable.h
@@ -105,7 +105,7 @@ public:
             Primitive *         GetPrimitive        (){return primitive;}
     const   AABB &              GetBoundingBox      ()const{return primitive->GetBoundingBox();}
 
-    const   PrimitiveDataBuffer *GetRenderBuffer    ()const{return primitive_data_buffer;}
+    const   PrimitiveDataBuffer *GetDataBuffer      ()const{return primitive_data_buffer;}
     const   PrimitiveRenderData *GetRenderData      ()const{return primitive_render_data;}
 };//class Renderable
 
diff --git a/src/SceneGraph/MaterialRenderList.cpp b/src/SceneGraph/MaterialRenderList.cpp
index 64c5ac63..4af939d9 100644
--- a/src/SceneGraph/MaterialRenderList.cpp
+++ b/src/SceneGraph/MaterialRenderList.cpp
@@ -110,7 +110,7 @@ void MaterialRenderList::RenderItem::Set(Renderable *ri)
 {
     pipeline=ri->GetPipeline();
     mi      =ri->GetMaterialInstance();
-    pdb     =ri->GetRenderBuffer();
+    pdb     =ri->GetDataBuffer();
     prd     =ri->GetRenderData();
 }
 
@@ -140,13 +140,27 @@ void MaterialRenderList::Stat()
     for(uint i=1;i<count;i++)
     {
         if(last_pipeline==rn->ri->GetPipeline())
-            if(last_data_buffer->Comp(rn->ri->GetRenderBuffer()))
+        {
+            if(last_data_buffer->vdm&&last_data_buffer->vdm==rn->ri->GetDataBuffer()->vdm)
+            {
                 if(last_render_data->_Comp(rn->ri->GetRenderData())==0)
                 {
                     ++ri->instance_count;
                     ++rn;
                     continue;
                 }
+            }
+            else
+            {
+                if(last_data_buffer->Comp(rn->ri->GetDataBuffer()))
+                    if(last_render_data->_Comp(rn->ri->GetRenderData())==0)
+                    {
+                        ++ri->instance_count;
+                        ++rn;
+                        continue;
+                    }
+            }
+        }
 
         ++ri_count;
         ++ri;
@@ -156,7 +170,8 @@ void MaterialRenderList::Stat()
         ri->Set(rn->ri);
 
         last_pipeline   =ri->pipeline;
-        last_data_buffer =ri->pdb;
+        last_data_buffer=ri->pdb;
+        last_vdm        =ri->pdb->vdm;
         last_render_data=ri->prd;
 
         ++rn;
@@ -261,8 +276,6 @@ void MaterialRenderList::Render(RenderCmdBuffer *rcb)
 
     cmd_buf=rcb;
 
-    RenderItem *ri=ri_array.GetData();
-
     last_pipeline   =nullptr;
     last_data_buffer=nullptr;
     last_vdm        =nullptr;
@@ -273,6 +286,7 @@ void MaterialRenderList::Render(RenderCmdBuffer *rcb)
 
     cmd_buf->BindDescriptorSets(material);
 
+    RenderItem *ri=ri_array.GetData();
     for(uint i=0;i<ri_count;i++)
     {
         Render(ri);
diff --git a/src/SceneGraph/Vulkan/VKRenderable.cpp b/src/SceneGraph/Vulkan/VKRenderable.cpp
index 249de445..785b5c77 100644
--- a/src/SceneGraph/Vulkan/VKRenderable.cpp
+++ b/src/SceneGraph/Vulkan/VKRenderable.cpp
@@ -26,6 +26,9 @@ const bool PrimitiveDataBuffer::Comp(const PrimitiveDataBuffer *pdb)const
 {
     if(!pdb)return(false);
 
+    if(vdm&&pdb->vdm)
+        return (vdm==pdb->vdm);
+
     if(vab_count!=pdb->vab_count)return(false);
 
     for(uint32_t i=0;i<vab_count;i++)