Now here’s something fun: http://alteredqualia.com/visualization/evolve/
So I’ve been playing around with this most of today. Basically it takes a 200×200 pixel image, and starts using random iterations of polygons to try and get closer and closer to reproducing the original. It starts off with 50 invisible polygons, and begins cycling through them, changing their shape and/or colour. It then computes if the change makes the composition closer to the original image. If it does, it keeps the change, if not it discards it. Repeat this a million times, and it actually does a pretty damn good job.