> Is writing one a particularly challenging thing to do? Depending on the speed at which you want frames to appear (vs. noise), it can be. Writing a raytracer

> Is writing one a particularly challenging thing to do? Depending on the speed at which you want frames to appear (vs. noise), it can be. Writing a raytracer that can render a few shiny spheres in a few seconds on modern hardware is trivial - not more than a weekend project if you know nothing about the subject. Writing one that can render a Stars Wars scene 25 times per second is a vastly different beast.