Nice information about anaglyphic pictures (you know, these pictures that let you experience 3D when viewing them with a pair of red/blue glasses), and how to create them yourself, can be found at Paul Bourke's webpages:
Via these pages I have been experimenting myself. Watch some of my povray (the persistance of vision raytracer ...) studies:
I have also been experimenting with real pictures. Using a Sony Mavica I create stereo pairs of real-life objects, and try to find the parameters which have to be used for the best stereoscopic effect. Below you will find a picture of an inflatable space shuttle, my first trial, and a net of volleyballs: