Terragen 2 is a very much more sophisticated terrain generating 3D Program. It has a lot of more powerful features that the original Terragen program. It is also available as a free download as well! You can find out more about the program by clicking here
If you already have this program then you may be interested to know that there is a Terragen contest regularly on Renderosity.com which is a place where "us" 3D Artists hang out! - LOL!
If you're interested in finding out more about these contests just click here.
