Update app.py

app.py

@@ -96,8 +96,9 @@ def image2mesh(
     mesh = generate_mesh(image, resolution)
 
     if simplify:
-        mesh = postprocess_mesh(mesh.vertices, mesh.faces, simplify=simplify, 
+        filled_mesh = postprocess_mesh(mesh.vertices, mesh.faces, simplify=simplify, 
                                 simplify_ratio=simplify_ratio, fill_holes=False, verbose=True)
+        mesh = trimesh.Trimesh(vertices=filled_mesh[0], faces=filled_mesh[1])
 
     mesh_path = os.path.join(output_path, f'{uid}.obj')
     mesh.export(