From TorqueWiki

[edit] Renderman by Pixar

RenderMan interface on http://www.pixar.com.

[edit] pixie

http://www.cs.utexas.edu/~okan/Pixie/pixie.htm

https://sourceforge.net/project/showfiles.php?group_id=59462

http://en.wikipedia.org/wiki/Pixie_(renderer)

wpixie wiki: http://www.george-graphics.co.uk/pixiewiki/Documentation/Installing_And_Running

Projects with pixie: http://www.cs.utexas.edu/~okan/