var indices = newSeq[uint32](mesh.faceCount * 3)
  var faces = cast[ptr Unchecked[PFace]](addr mesh.faces)
  for i in 0..mesh.faceCount - 1:
    var indis = cast[ptr Unchecked[uint32]](addr faces[i].indices)
    for ii in 0..3:
      indices[i * 3 + ii] = indis[ii]