If this ain’t impressive I don’t know what is

This is built using Firefox 1.5′s new canvas tag and Javascript. If you haven’t got it, here’s your excuse to do so It produces a virtual room with walls, some lighting on the wall which change as you move around the room. You navigate around the room using the w, a, s, d keys. You may have to disable the “begin finding as I type” option for the best results (disabled by default). The speed and performance is pretty good.

It’ll also work in Safari There is also some documentation on the raycaster.