While watching the Athletics lose another game (sigh), I dusted off this paper and coded up a quick implementation. It seems to work, although I’m having some problem with the tone mapping bits, and haven’t bothered getting any color into it yet. It’s not really very useful, except perhaps for making backgrounds for your desktop.

Realtime implementations of this are available, especially as screensavers. My favorite is the electric sheep, which provides a never-ending variety of cool looking flame fractals.