Discover a free video tutorial on RenderMan: Pixar Disney Shader by Tronic Lin. RenderMan (formerly PhotoRealistic RenderMan), RenderMan Studio and RenderMan Pro Server are proprietary photorealistic 3D rendering addons to Autodesk Maya based on their own RenderMan Interface Specification. It is produced by Pixar and is used to render all of their in-house 3D animated movie productions. It is also available as a commercial product licensed to third parties. It primarily uses the Reyes algorithm but is also capable of ray tracing and global illumination.