chore: planes has 1 item?

app.py

@@ -185,8 +185,8 @@ def generate_mesh(image, source_size=512, render_size=384, mesh_size=512, export
     with torch.no_grad():
         planes = model_wrapper.forward(image, source_camera)
         planes_pil_image = np.concatenate([
-            np.concatenate([planes[1], planes[2]], axis=1),
-            np.concatenate([planes[3], planes[0]], axis=1),
+            np.concatenate([planes[0][1], planes[0][2]], axis=1),
+            np.concatenate([planes[0][3], planes[0][0]], axis=1),
         ], axis=0)
 
         if export_mesh: