Hi folks,
I subscribe to the Kim Komando blog (she's a radio talk show host that covers all things digital) once in awhile she has some very useful programs freebies and today was one of them. She plugged a free sculpting program called Sculptris. Now I have never done any modeling and this program seems very easy to learn. The only thing is I don't know if it can be imported directly or if you would have to have a third party program to do that with. Maybe someone with more "know" can tell us. But here it is... get it while you can.
http://www.sculptris.com/index.html