Attached Link: http://www.gscape.com/

Maybe you have heard of it before, maybe not, but i found this small program that is free of use as long as it is not commercial use.

It not as good as Terragen, but it comes with a load of trees and it is all in real-time.

Mind you, you need 256 mb of ram, a 1Ghz processor and a Gforce 3 or better. I would not hurt to read the docs of this program as-well. The above picture is running on about 11 a 12 frames per seccond, and i have 1.8Ghz and 1gig of memory.

Robert van der Veeke Basugasubasubasu Basugasubakuhaku Gasubakuhakuhaku!! "Better is the enemy of good enough." Dr. Mikoyan of the Mikoyan Gurevich Design Bureau.