Daz3D periodically gives some of their core programs away and they are useful for a lot of things--on a professional as well as hobby level.
If you're in the category of, "That's what I have always wanted to do!" you can grab Daz Studio 4.5, Hexagon 2.0 and Bryce 7.0 for FREE at this link.
Enjoy--full serials included from the company.