Caleb Spare

http://graphics.stanford.edu/~henrik/papers/bssrdf/

For background images and whatnot.

- Octrees - BSP - k-d trees

Probably very hard.

Maybe STL to get started?

- Cones - Cylinders - Toroids - Convex polyhedra - Triangle meshes - Constructive solid geometry

- Lights at infinity - Model the sun - Light has a direction vector instead of a position - Area lights - Lights are a rectangle or circle - Sample...

This should really reduce the cost of antialiasing.