First Mudbox orc continues

A little more disgruntled-looking, and I got rid of the doll-eye stare. The mouth is still giving me trouble.

First Mudbox assignment

I made a terrified orc, which should not be. The drums of war are her lullaby. She should look fiercer.
I started with the head shape and tweaked it with these tools:

I also wanted to build something out of nothing so I made a cat face out of a sphere. It has the same problem with the mouth looking jagged.