glTF exporter: manage factors for Clearcoat extension

1 files changed, 6 insertions, 2 deletions

diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather_materials.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather_materials.py
index 6bd7834b..a15f0f8d 100755
--- a/io_scene_gltf2/blender/exp/gltf2_blender_gather_materials.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_gather_materials.py
@@ -273,7 +273,9 @@ def __gather_clearcoat_extension(blender_material, export_settings):
         clearcoat_extension['clearcoatFactor'] = clearcoat_socket.default_value
         clearcoat_enabled = clearcoat_extension['clearcoatFactor'] > 0
     elif __has_image_node_from_socket(clearcoat_socket):
-        clearcoat_extension['clearcoatFactor'] = 1
+        fac = gltf2_blender_get.get_factor_from_socket(clearcoat_socket, kind='VALUE')
+        # default value in glTF is 0.0, but if there is a texture without factor, use 1
+        clearcoat_extension['clearcoatFactor'] = fac if fac != None else 1.0
         has_clearcoat_texture = True
         clearcoat_enabled = True
 
@@ -283,7 +285,9 @@ def __gather_clearcoat_extension(blender_material, export_settings):
     if isinstance(clearcoat_roughness_socket, bpy.types.NodeSocket) and not clearcoat_roughness_socket.is_linked:
         clearcoat_extension['clearcoatRoughnessFactor'] = clearcoat_roughness_socket.default_value
     elif __has_image_node_from_socket(clearcoat_roughness_socket):
-        clearcoat_extension['clearcoatRoughnessFactor'] = 1
+        fac = gltf2_blender_get.get_factor_from_socket(clearcoat_roughness_socket, kind='VALUE')
+        # default value in glTF is 0.0, but if there is a texture without factor, use 1
+        clearcoat_extension['clearcoatRoughnessFactor'] = fac if fac != None else 1.0
         has_clearcoat_roughness_texture = True
 
     # Pack clearcoat (R) and clearcoatRoughness (G) channels.