It is a Persistance Of Vision (POV-Ray) oriented modeller.

GNU GMAN is an implementation of the RenderMan interface specification. It is a high-quality renderer supporting zbuffer, radiosity, distributed raytracing, spatial and temporal anti-aliasing (motion blur), surfaces such as NURBS and patches, and other features.

Rendering and modelling package.

Mirror link for an orphaned GPL modelling, illuminating and rendering program.

Rayshade is rendering system for creating ray-traced images.