If you have a good 3D gfx card...

Check this one out ;)

http://pouet.net/prod.php?which=30244

(PC windows, Direct X 9.0b)

This has been shown before I think!

I must have missed it. I think it's pretty damn amazing!

Youtube version: http://www.youtube.com/watch?v=A3HFfvscBcM

I've never seen it, it looks very cool :)