Update app.py

app.py

@@ -341,7 +341,8 @@ def generate(
         new_filepath = os.path.join(static_folder, new_filename)
         shutil.copy(glb_path, new_filepath)
         
-        yield gr.File(new_filepath)
+        # Yield a 3D model viewer component with a white background.
+        yield gr.Model3D(new_filepath, clear_color=[1, 1, 1, 1])
         return
 
     # --- Image Generation branch ---