playing about with zbrush.. not sure whether I prefer this to mudbox or not, bought this a while ago though.. and I’ll be getting version 4 for free because of pixologic awesome upgrade policy, just wish the interface was a bit more familiar :)

zbrush-doodle01

another program for doing this sort of stuff is 3D Coat.. think I’ll stay away from that one though, the EULA is more than a little strange

info here