diff --git a/leenkx/blender/lnx/make_world.py b/leenkx/blender/lnx/make_world.py
index 001624b..ebe197a 100644
--- a/leenkx/blender/lnx/make_world.py
+++ b/leenkx/blender/lnx/make_world.py
@@ -190,6 +190,7 @@ def build_node_tree(world: bpy.types.World, frag: Shader, vert: Shader, con: Sha
         world.lnx_envtex_color = [col[0], col[1], col[2], 1.0]
         world.lnx_envtex_strength = 1.0
         world.world_defs += '_EnvCol'
+        assets.add_khafile_def("lnx_envcol")
 
     # Clouds enabled
     if rpdat.lnx_clouds and world.lnx_use_clouds:
@@ -271,6 +272,7 @@ def parse_surface(world: bpy.types.World, node_surface: bpy.types.Node, frag: Sh
         # Append irradiance define
         if rpdat.lnx_irradiance and not solid_mat:
             wrd.world_defs += '_Irr'
+            assets.add_khafile_def("lnx_irradiance")
 
         # Extract environment strength
         # Todo: follow/parse strength input
@@ -284,6 +286,7 @@ def parse_surface(world: bpy.types.World, node_surface: bpy.types.Node, frag: Sh
             solid_mat = rpdat.lnx_material_model == 'Solid'
             if rpdat.lnx_irradiance and not solid_mat:
                 world.world_defs += '_Irr'
+                assets.add_khafile_def("lnx_irradiance")
             world.lnx_envtex_color = node_surface.inputs[0].default_value
             world.lnx_envtex_strength = 1.0