diff --git a/leenkx/blender/lnx/material/make_finalize.py b/leenkx/blender/lnx/material/make_finalize.py
index d549fff..9760e3c 100644
--- a/leenkx/blender/lnx/material/make_finalize.py
+++ b/leenkx/blender/lnx/material/make_finalize.py
@@ -75,14 +75,6 @@ def make(con_mesh: ShaderContext):
             vert.write('eyeDir = eye - wposition;')
         frag.write_attrib('vec3 vVec = normalize(eyeDir);')
 
-    export_wpos = False
-    if frag.contains('wposition') and not frag.contains('vec3 wposition'):
-        export_wpos = True
-    if tese is not None:
-        export_wpos = True
-    if vert.contains('wposition'):
-        write_wpos = True
-
     if export_wpos:
         vert.add_uniform('mat4 W', '_worldMatrix')
         vert.add_out('vec3 wposition')
@@ -91,6 +83,9 @@ def make(con_mesh: ShaderContext):
         vert.add_uniform('mat4 W', '_worldMatrix')
         vert.write_attrib('vec3 wposition = vec4(W * spos).xyz;')
 
+    if frag.contains('dotNV') and not frag.contains('float dotNV'):
+        frag.write_attrib('float dotNV = max(dot(n, vVec), 0.0);')
+
     frag_mpos = (frag.contains('mposition') and not frag.contains('vec3 mposition')) or vert.contains('mposition')
     if frag_mpos:
         vert.add_out('vec3 mposition')