I don't have anything to suggest in terms of adapting or implementing this, but
I was just looking around and found this.
http://news.povray.org/povray.binaries.images/message/%3C4cd5e4f2%40news.povray.org%3E/#%3C4cd5e4f2%40news.povray.org%3
E
Not sure if that's of any use at all....
