Sigh go out door and count how many symmeterical or near symmeterical are out there. Do troll come with one eye? A model of a troll do still have two arms, two legs, 2 sided ribs, symmmeterical head and body? I have never seen an object that do not have symmeterical at all. Plants still have symmeterical and near-symmeterical on most parts.. ZBrush has symmeterical and near-symmeterical function built in.