I use to play with Bryce. Since then I have taken photo classes in high school. I am now more interested in taking photos and altering them, as opposed to making them with Bryce.
You might want to look into a program called Rhinoceros found at http://www.rhino3d.com/.
It is an amazing program, I never did get the hang of it, but I have seen some of what it has produced and it is truly incredible.