Update app.py

app.py

@@ -157,7 +157,10 @@ def _gen_shape(
     save_folder = gen_save_folder()
     image = rmbg_worker(rgb_image)
 
-    generator = torch.Generator(device=args.device).manual_seed(seed)
+    if args.device in ["cuda", "cpu"]:
+        generator = torch.Generator(device=args.device).manual_seed(seed)
+    else:
+        generator = torch.Generator().manual_seed(seed)  # fallback für MPS
 
     outputs = i23d_worker(
         image=image,