windflower

http://3dfs.alpha-sigma.net/3DFS.html

3DFS's features are :
polygonal object rendering (a face can be any 3D convex polygon);
camera management (track, dolly, tumble, pan & shake functions);
visible surface determination via S-Buffer implementation (perfect object intersection);
clipping (front, left, right, back planes);
backface culling (per object or face enabling);
flat shading with lighting coefficients : ambiant, diffuse & specular;
variable rendering resolution and simple variable blur rendering;
user defined object mouse events : onMouseOver, onPress, onRelease, etc;
usual math transformations : scaling, Euler & quaternion rotating, etc;
XML format scene loader;
command line 3DS Max '.ASE' format converter ('tri' or 'quad' modes available);

via: http://www.sephiroth.it/index.php