Here's a clip from Pixar's upcoming animated short, The Blue Umbrella.
Pixar have released RenderMan 19 for commercial use, with a free non-commercial version coming in 2015.
Party Central - Clips
Check out these two clips from Pixar's upcoming Party Central short film.
Shining a New Light on Pixar
See how global illumination is powering the upcoming Monsters University and The Blue Umbrella from Pixar.