diff --git a/example/Vulkan/InlineGeometryScene.cpp b/example/Vulkan/InlineGeometryScene.cpp
index df1b5c4f..537b1675 100644
--- a/example/Vulkan/InlineGeometryScene.cpp
+++ b/example/Vulkan/InlineGeometryScene.cpp
@@ -26,25 +26,37 @@ private:
     Material *          material            =nullptr;
     MaterialInstance *  material_instance   =nullptr;
 
+    Material *          axis_material       =nullptr;
+    MaterialInstance *  axis_mi             =nullptr;
+
     PipelineData *      pipeline_data       =nullptr;
-    Pipeline *          pipeline_line       =nullptr;
+    Pipeline *          axis_pipeline       =nullptr;
     Pipeline *          pipeline_solid      =nullptr;
 
-    GPUBuffer *            ubo_color           =nullptr;
+    GPUBuffer *         ubo_color           =nullptr;
 
-    Renderable          *ro_plane_grid,
-                                *ro_cube,
-                                *ro_sphere,
-                                *ro_dome,
-                                *ro_torus,
-                                *ro_cylinder,
-                                *ro_cone;
+    Renderable          *ro_axis,
+                        *ro_cube,
+                        *ro_sphere,
+                        *ro_dome,
+                        *ro_torus,
+                        *ro_cylinder,
+                        *ro_cone;
 
 private:
 
     bool InitMaterial()
     {
-        material=db->CreateMaterial(OS_TEXT("res/material/VertexColor3D"));
+        axis_material=db->CreateMaterial(OS_TEXT("res/material/VertexColor3D"));
+        if(!axis_material)return(false);
+
+        axis_mi=db->CreateMaterialInstance(axis_material);
+        if(!axis_mi)return(false);
+
+        axis_pipeline=CreatePipeline(axis_material,InlinePipeline::Solid3D,Prim::Lines);
+        if(!axis_pipeline)return(false);
+
+        material=db->CreateMaterial(OS_TEXT("res/material/DebugVertexNormal"));
         if(!material)return(false);
 
         material_instance=db->CreateMaterialInstance(material);
@@ -53,8 +65,6 @@ private:
         pipeline_data=GetPipelineData(InlinePipeline::Solid3D);
         if(!pipeline_data)return(false);
 
-        pipeline_line=CreatePipeline(material,pipeline_data,Prim::Lines);
-        if(!pipeline_line)return(false);
 
         pipeline_solid=CreatePipeline(material,pipeline_data,Prim::Triangles);
         if(!pipeline_solid)return(false);
@@ -65,23 +75,11 @@ private:
     void CreateRenderObject()
     {
         {
-            struct PlaneGridCreateInfo pgci;
+            struct AxisCreateInfo aci;
 
-            pgci.coord[0].Set(-100,-100,0);
-            pgci.coord[1].Set( 100,-100,0);
-            pgci.coord[2].Set( 100, 100,0);
-            pgci.coord[3].Set(-100, 100,0);
+            aci.size=200;
 
-            pgci.step.u=20;
-            pgci.step.v=20;
-
-            pgci.side_step.u=10;
-            pgci.side_step.v=10;
-
-            pgci.color.Set(0.5,0,0,1);
-            pgci.side_color.Set(1,0,0,1);
-
-            ro_plane_grid=CreateRenderablePlaneGrid(db,material,&pgci);
+            ro_axis=CreateRenderableAxis(db,axis_material,&aci);
         }
         
         {
@@ -152,6 +150,11 @@ private:
             return(false);
 
         material_instance->Update();
+
+        if(!axis_mi->BindUBO("world",GetCameraMatrixBuffer()))
+            return(false);
+
+        axis_mi->Update();
         return(true);
     }
     
@@ -171,7 +174,7 @@ private:
 
     bool InitScene()
     {
-        Add(ro_plane_grid,pipeline_line);
+        render_root.Add(db->CreateRenderableInstance(ro_axis,axis_mi,axis_pipeline));
 //        Add(ro_dome,pipeline_solid);
         Add(ro_torus    ,pipeline_solid);
         Add(ro_cube     ,pipeline_solid,translate(-10,  0, 5)*scale(10,10,10));
diff --git a/example/Vulkan/OffscreenRender.cpp b/example/Vulkan/OffscreenRender.cpp
index 4af8c8ce..e69cd41a 100644
--- a/example/Vulkan/OffscreenRender.cpp
+++ b/example/Vulkan/OffscreenRender.cpp
@@ -29,7 +29,7 @@ class TestApp:public CameraAppFramework
     
     struct:public RenderObject
     {
-        Sampler *           sampler             =nullptr;        
+        Sampler *           sampler             =nullptr;
        
         Pipeline *          pipeline            =nullptr;
         RenderableInstance *renderable_instance =nullptr;
diff --git a/inc/hgl/graph/InlineGeometry.h b/inc/hgl/graph/InlineGeometry.h
index b433111e..686482c2 100644
--- a/inc/hgl/graph/InlineGeometry.h
+++ b/inc/hgl/graph/InlineGeometry.h
@@ -193,37 +193,18 @@ namespace hgl
         
         struct AxisCreateInfo
         {
-            Vector3f root;
-            Vector3f size;
+            float size;
             Color4f color[3];
 
         public:
 
-            void RestartColor()
+            AxisCreateInfo()
             {
+                size=1.0f;
                 color[0].Set(1,0,0,1);
                 color[1].Set(0,1,0,1);
                 color[2].Set(0,0,1,1);
             }
-
-            void Set(const AABB &box)
-            {
-                root=box.CenterPoint().xyz();
-                size=box.HalfSize().xyz();
-            }
-
-            AxisCreateInfo()
-            {
-                root.Set(0,0,0);
-                size.Set(1,1,1);
-                RestartColor();
-            }
-
-            AxisCreateInfo(const AABB &box)
-            {
-                Set(box);
-                RestartColor();
-            }
         };//struct AxisCreateInfo
 
         /**
diff --git a/src/SceneGraph/InlineGeometry.cpp b/src/SceneGraph/InlineGeometry.cpp
index b76cf5fe..7c54db6f 100644
--- a/src/SceneGraph/InlineGeometry.cpp
+++ b/src/SceneGraph/InlineGeometry.cpp
@@ -1125,6 +1125,8 @@ namespace hgl
 
         Renderable *CreateRenderableAxis(RenderResource *db,Material *mtl,const AxisCreateInfo *aci)
         {
+            if(!db||!mtl||!aci)return(nullptr);
+
             RenderableCreater rc(db,mtl);
 
             if(!rc.Init(6))
@@ -1136,14 +1138,14 @@ namespace hgl
             if(!vertex||!color)
                 return(nullptr);
 
-            vertex->Write(aci->root);color->Write(aci->color[0]);
-            vertex->Write(aci->root.x+aci->size[0],aci->root.y,aci->root.z);color->Write(aci->color[0]);
+            const float s=aci->size;
 
-            vertex->Write(aci->root);color->Write(aci->color[1]);
-            vertex->Write(aci->root.x,aci->root.y+aci->size[1],aci->root.z);color->Write(aci->color[1]);
-
-            vertex->Write(aci->root);color->Write(aci->color[2]);
-            vertex->Write(aci->root.x,aci->root.y,aci->root.z+aci->size[2]);color->Write(aci->color[2]);
+            vertex->Write(0,0,0);color->Write(aci->color[0]);
+            vertex->Write(s,0,0);color->Write(aci->color[0]);
+            vertex->Write(0,0,0);color->Write(aci->color[1]);
+            vertex->Write(0,s,0);color->Write(aci->color[1]);
+            vertex->Write(0,0,0);color->Write(aci->color[2]);
+            vertex->Write(0,0,s);color->Write(aci->color[2]);
 
             return rc.Finish();
         }