Of course the French crazzy prog Hexagon accept images as background ;)
A very neat interface!
Load it as it's free only during this Februar month!!! (else 149, 95 $) or the trilogy Daz Studio 4 Pro + Bryce Pro + Hexagon 2.5 more 800 $ !!!
http://www.daz3d.com/i/3d/free-3d-software-overview?home_5_btn=start
(Pc, MAC)
By Patrick Tuten