Hi Will,

> I guess due to being a non-closed surface. Not sure how to fix that...)

Most polygon modeling programs will have a "flip" function that can be used to fix that. I'm not very familiar with ZBrush but I would think it should have that somewhere in it.

On the second one, make sure you don't have the display set in ZBrush to "flat" or something like that, it looks like you may have smooth shading turned off there. It may be a in a set of display properties that list something like : Wireframe, Flat, Gouraud, ...

It may be labeled something like "Gouraud" or smooth.

Sorry I'm not more familiar with ZBrush to give you a more precise answer.

- Michael