You might visit this one just for the experience. May be possible to run on Atari emulators. Well now is your opportunity. This ambititious project is dedicated to collecting some of YOUR best images and publishing them on a CD to help support the POV-Team's development activities. Mostly compatible with existing shaders used in BMRT, Renderman and others.
Some limitations do apply.
This include file will create a realistic feather object. The 3D artists community. The functions are grouped into categories. It also has a preview feature. This is basically a front-end to generate POV texture code.