sync

Content/Python/auto_import_pipeline.py

@@ -63,16 +63,21 @@ def import_fbx(filename, name, dest_path):
 
 
 def assign_material(skeletal_mesh, material):
+    existing_slots = skeletal_mesh.get_editor_property("materials")
     new_slots = []
-    for slot in skeletal_mesh.get_editor_property("materials"):
+    for slot in existing_slots:
         new_slot = unreal.SkeletalMaterial()
         new_slot.set_editor_property("material_interface", material)
         new_slot.set_editor_property("material_slot_name", slot.get_editor_property("material_slot_name"))
-        new_slot.set_editor_property("uv_channel_data", slot.get_editor_property("uv_channel_data"))
         new_slots.append(new_slot)
-    skeletal_mesh.set_editor_property("materials", new_slots)
+    if not new_slots:
+        # FBX had no material assigned to the mesh, so no slot was created on import.
+        fallback = unreal.SkeletalMaterial()
+        fallback.set_editor_property("material_interface", material)
+        fallback.set_editor_property("material_slot_name", "Material")
+        new_slots.append(fallback)
     skeletal_mesh.modify()
-    skeletal_mesh.post_edit_change()
+    skeletal_mesh.set_editor_property("materials", new_slots)
     unreal.EditorAssetLibrary.save_asset(skeletal_mesh.get_path_name())
 
 
@@ -107,12 +112,17 @@ for asset_folder in os.listdir(DEMO_ROOT):
                                        unreal.MaterialInstanceConstantFactoryNew())
         mel.set_material_instance_parent(mi, master)
 
+        textures = {}
         for suffix, (param, _, _) in PARAMS.items():
             if suffix not in files:
                 continue
             texture = import_task(os.path.join(src_dir, files[suffix]), f"T_{base_name}{suffix}", dest_path)
+            textures[suffix] = texture
             mel.set_material_instance_texture_parameter_value(mi, param, texture)
 
+        if "_E" not in files and "_BC" in textures:
+            mel.set_material_instance_texture_parameter_value(mi, "Emissive", textures["_BC"])
+
         unreal.EditorAssetLibrary.save_asset(mi.get_path_name())
         assign_material(mesh, mi)
         asset_count += 1