uv_mask512/256/128_with_faceid_smpl.npy

[caiyongqi]

I found that not all faces are included in this file, is this right?

[caiyongqi]

print(45 in uv_mask_faceid) -> False

[qianlim]

Hello, yes, that's correct. It depends on the resolution of the UV map. The pixels on the UV 'islands' correspond to points on the body surface. The 'faceid' here means the index of the SMPL triangles where these points locate in 3D. In some cases there can be more than one points falling on the same triangle. So the number of unique faces stored in these npy files <= the number of valid UV pixels. Many faces in SMPL/SMPLX are on in these lists.