I can imagine several ways to describe polygons, which can be populated, but
none of them are very easy. It depends, how your landscape and your camera
is defined.
For a beginning, look at the source of the povlogo forest image:
http://news.povray.org/povray.binaries.scene-files/message/%3C432414bf%40news.povray.org%3E/#%3C432414bf%40news.povray.
org%3E
Norbert Kern
