RenderMan was developed by Pixar.
Pixar . Pixar is best known for CGI-animated feature films created with RenderMan , Pixar 's own implementation of the industry-standard RenderMan image-rendering application programming interface , used to generate high-quality images . RenderMan (software) . RenderMan is used by Pixar to render all of their in-house 3D animated movie productions and is also available as a commercial product licensed to third parties .