RenderMan has been used for most of Pixar’s own movies such as the Toy Story, Ratatouille and The Incredibles will be releasing it’s new version with big price restructuring. It will still be a licensed software with $495 per license (once off) and $200 subscription for a year, but will be FREE for Non-Commercial Use

Free Non-Commercial Use

With the upcoming release RenderMan will be free for non-commercial usage.
Examples of non-commercial use-cases include evaluations, personal learning,
experimentation, research, and the development of tools and plug-ins for RenderMan.

Toy Story Aliens

Don’t get too excited yet, you should remember that RenderMan alone isn’t going to be enough to make a movie. It’s not animation software and Pixar will continue to keep its animation software proprietary. RenderMan also appears to have a reputation for being quite user-unfriendly, so it’s probably not worth downloading just to have a play about with unless you’ve already got some experience in the field.

Check out the RenderMan/RIS – Interactive Subsurface Scattering feature below

[Origin]