Hey everyone,
Yazan Malkosh has graciously released a set of 100 custom MatCap materials for Modo, that also work with ZBrush.
http://www.9bstudios.com/9bstudios/c..._Released.html
I've fooled around with a handful this afternoon, and they work great. He's looking for some help in converting the lot over to .ZTM if any of you are savvy with that. In the meantime, I simply converted the .PNG file to .JPG and swapped out the texture file in a default MatCap.
Enjoy!
-Steve