Hi Will, ZBrush doesn't handle n-gons well, it turns those into triangles by just taking the average point of all the points of the polygon and connecting that to every point. So any kind of more complex n-gon that goes around holes and such with a concave shape will not get handled well, triangles will "leak" outside of the n-gon.

So you definitely need to use Quads & Triangles output to ZBrush, not n-gons.

I think you should see a big improvement with ZBrush handling with dicing things up into smaller bits though. It seems to handle triangles much better if they aren't big ones.

I don't think it is so much the "quadness" of your character models that it likes, but rather it's the "small evenly spaced-ness" that tends to go along with that.

- Michael