diff --git a/example/Basic/BillboardTest.cpp b/example/Basic/BillboardTest.cpp
index e39ec6e1..9df4a2b6 100644
--- a/example/Basic/BillboardTest.cpp
+++ b/example/Basic/BillboardTest.cpp
@@ -130,7 +130,7 @@ private:
         using namespace inline_geometry;
 
         {
-            PrimitiveCreater pc(GetDevice(),mi_plane_grid->GetVIL());
+            auto pc=GetPrimitiveCreater(mi_plane_grid);
 
             struct PlaneGridCreateInfo pgci;
 
@@ -140,18 +140,18 @@ private:
             pgci.lum=128;
             pgci.sub_lum=192;
 
-            prim_plane_grid=CreatePlaneGrid2D(&pc,&pgci);
+            prim_plane_grid=CreatePlaneGrid2D(pc,&pgci);
         }
 
         {
-            PrimitiveCreater pc(GetDevice(),mi_billboard->GetVIL());
+            auto pc=GetPrimitiveCreater(mi_billboard);
 
-            pc.Init("Billboard",1);
+            pc->Init("Billboard",1);
 
-            if(!pc.WriteVAB(VAN::Position,VF_V3F,position_data))
+            if(!pc->WriteVAB(VAN::Position,VF_V3F,position_data))
                 return(false);
 
-            ro_billboard=db->CreateMesh(&pc,mi_billboard,pipeline_billboard);
+            ro_billboard=db->CreateMesh(pc,mi_billboard,pipeline_billboard);
 
             if(!ro_billboard)
                 return(false);
diff --git a/example/Gizmo/PlaneGrid3D.cpp b/example/Gizmo/PlaneGrid3D.cpp
index 357f795f..5c7a3f81 100644
--- a/example/Gizmo/PlaneGrid3D.cpp
+++ b/example/Gizmo/PlaneGrid3D.cpp
@@ -69,9 +69,9 @@ private:
         pgci.lum=180;
         pgci.sub_lum=255;
 
-        PrimitiveCreater pc(GetDevice(),material_instance[0]->GetVIL());
+        auto pc=GetPrimitiveCreater(material_instance[0]);
 
-        prim_plane_grid=CreatePlaneGrid2D(&pc,&pgci);
+        prim_plane_grid=CreatePlaneGrid2D(pc,&pgci);
 
         return prim_plane_grid;
     }
diff --git a/inc/hgl/WorkObject.h b/inc/hgl/WorkObject.h
index 4309d0fd..28844532 100644
--- a/inc/hgl/WorkObject.h
+++ b/inc/hgl/WorkObject.h
@@ -94,6 +94,14 @@ namespace hgl
             return db->CreateMaterialInstance(mtl_name,mci,vil_cfg);
         }
 
+        AutoDelete<graph::PrimitiveCreater> GetPrimitiveCreater(graph::MaterialInstance *mi)
+        {
+            if(!mi)
+                return(nullptr);
+
+            return(new graph::PrimitiveCreater(GetDevice(),mi->GetVIL()));
+        }
+
         graph::Primitive *CreatePrimitive(  const AnsiString &name,
                                             const uint32_t vertices_count,
                                             const graph::VIL *vil,