diff --git a/ShaderLibrary/Std3D/BlinnPhong/SunLightPureColor.mtl b/ShaderLibrary/Std3D/BlinnPhong/SunLightPureColor.mtl
index 35e23648..0a85d8f2 100644
--- a/ShaderLibrary/Std3D/BlinnPhong/SunLightPureColor.mtl
+++ b/ShaderLibrary/Std3D/BlinnPhong/SunLightPureColor.mtl
@@ -39,21 +39,10 @@ Output
 
 Code
 {
-    mat3 GetNormalMatrix()
-    {
-        return mat3(camera.view*GetLocalToWorld());
-    }
-
-    vec3 GetNormal(mat3 normal_matrix,vec3 normal)
-    {
-        return normalize(normal_matrix*normal);
-    }
 
     void main()
     {
-        mat3 normal_matrix=GetNormalMatrix();
-
-        Output.Normal   =GetNormal(normal_matrix,Normal);
+        Output.Normal   =GetNormal(GetNormalMatrix(),Normal);
         Output.Position =GetPosition3D();
         
         HandoverMI();
diff --git a/src/ShaderGen/3d/Std3DMaterial.cpp b/src/ShaderGen/3d/Std3DMaterial.cpp
index 1835bcce..9e2da53a 100644
--- a/src/ShaderGen/3d/Std3DMaterial.cpp
+++ b/src/ShaderGen/3d/Std3DMaterial.cpp
@@ -30,12 +30,13 @@ bool Std3DMaterial::CustomVertexShader(ShaderCreateInfoVertex *vsc)
     else
         vsc->AddFunction(cfg->camera?func::GetPosition3DCamera:func::GetPosition3D);
 
-    //if(cfg->camera
-    // &&cfg->local_to_world)
-    //{
-    //    vsc->AddFunction(func::GetNormalMatrix);
-    //    vsc->AddFunction(func::GetNormal);
-    //}
+    if(cfg->camera
+     &&cfg->local_to_world)
+    {
+        vsc->AddFunction(func::GetNormalMatrix);
+        vsc->AddFunction(func::GetNormal);
+//        vsc->AddFunction(func::GetNormalVS);
+    }
 
     mci->AddStruct(SBS_ViewportInfo);
 
diff --git a/src/ShaderGen/common/MFGetNormal.h b/src/ShaderGen/common/MFGetNormal.h
index bf55395b..04d19ad0 100644
--- a/src/ShaderGen/common/MFGetNormal.h
+++ b/src/ShaderGen/common/MFGetNormal.h
@@ -17,6 +17,13 @@ vec3 GetNormal(mat3 normal_matrix,vec3 normal)
 {
     return normalize(normal_matrix*normal);
 }
+)";
+
+    constexpr const char *GetNormalVS=R"(
+vec3 GetNormal()
+{
+    return normalize(mat3(camera.view*GetLocalToWorld())*Normal);
+}
 )";
 }//namespace func
 STD_MTL_NAMESPACE_END