Pixie is a pretty amazing renderer for 3D that is attempting to be a clone of Pixar's award-winning Renderman product— which just happens to start at around $1,000. From the gallery I've seen, they are darn close. Keep in mind Renderman is not an easy system to use to begin with. Pixie is all text-based. You enter data, and pass that along to the renderer. The great thing is, you can theoretically tie Pixie in to almost any workflow, especially with apps that would otherwise tie into Renderman (i.e. Maya). An excellent program, and as always, in need of more coders.