You can now download a copy of RenderMan for your non-commercial projects. Now all we need is good Blender integration!
I've been using RenderMan for a while now at my workplace, but now I can utilize it at home as well! AWESOME!!!
RenderMan is now free for all non-commercial purposes, including evaluations, education, research, and personal projects. The non-commercial version of RenderMan is fully functional without watermark or limitation. For further details please refer to Pixar's Non-Commercial RenderMan FAQ.
If you're ready to get started with Free Non-Commercial RenderMan ...
then you may proceed to Download & Installation.
They even included Blender as a potential candidate, so what are we waiting for?