RenderMan is an API developed by Pixar Animation Studios to describe three dimensional scenes and turning them into digital photorealistic images. The full name is the RenderMan Interface Specification. RenderMan also is the part of the name of a rendering software package developed by Pixar which implements this API. RenderMan is often used in creating digital visual effects for the Hollywood blockbuster movies of today such as Star Wars and The Lord of the Rings. Source: [wikipedia: renderman]