Save 3D face model with texture represented by colors. Args: obj_name: str vertices: shape = (nver, 3) triangles: shape = (ntri, 3) colors: shape = (nver, 3)
(obj_name, vertices, triangles=None, colors=None, normals=None,
normal_idxs=None, texcoords=None, texcoord_idxs=None,
mtllib=False, uv_name=None)