Literature and tutorials for writing a ray tracer

Question

I am interested in finding recommendations on books on writing a raytracer, simple and clear implementations of ray tracing that can be seen on the web, and online resources

Answer 1

The best one I have found is: http://www.devmaster.net/articles/raytracing_series/part1.php This tutorial does tend to move a bit fast, but it covers lots of aspects of raytracing.