I wrote a small realtime raytracer. It can render spheres and a floor plane. Because I have not enough time to work on it, it is very slow. For example the square-root algorithm is not optimized. Nonetheless I use Supersampling and hardware accelerated interpolation to speed up the process.
yartrt-0.2.0.tar.gz
Feel free to write comments to: thehanse(at)gmail(dot)com