For the impatient or people without sufficient hardware, a YouTube recording is here: <a href="http://www.youtube.com/watch?v=_YWMGuh15nE" rel="nofollow">http://www.youtube.com/watch?v=_YWMGuh15nE</a><p>One of the guys who created this little gem gave a presentation about the technology behind it; slides are here: <a href="http://iquilezles.org/www/material/function2009/function2009.htm" rel="nofollow">http://iquilezles.org/www/material/function2009/function2009...</a>