{
  "obj_id": "003_cracker_box",
  "z_offset_m": 0.1198,
  "scale_factor": 1.0,
  "source_mesh": "/home/vision/Project/Affordance2Grasp/data_hub/meshes/SAM3DMesh/meshes/ycb/003_cracker_box/mesh.ply",
  "source": "usd_mesh",
  "note": "z_offset computed from USD vertices after R_align (if any)"
}