Hey pp, you like Renderman technologie? but the shader code is like pain?
cry no more, there is now a visual editor for you check out this link:
http://www.dream.com.ua/thetool.html
it’s compatible with most of the free renderer machine like Pixie. now if yuo want to put your head in raytrace and rib there is some link:
http://www.cs.berkeley.edu/~okan/Pixie/pixie.htm
the script to get some rib file out of blender:
http://www.janw.gothere.uk.com/Download/Python/ribexport.py