Anima8 with the uvmapper is great for stuff like making morphs and altering clothing. Price is good, too. (www.anim8or.com) Also, strata is free...www.strata3d.com.. it is a little more complex, but renders nicely and has some built in lighting and f/x. And...I just tripped over one called marble clay the other day, free also...and I really, really really like that one...because it is EASY!!! (Lost the url, though.)