1.Go download the program from here.
http://www.planetside.co.uk
2. Hit World file>Generate terrain. then it will open up this menu.

Rundown:
-1 realsim of course is how detailed and realistic the textures of the
mountains look.
smoothing will smooth it out make it look not so rough and cgish.
Glaycionism and Canyonism determiens how low the valleys and
how high the peeks are
-2When finished with it and have your mountains the way you liek hit
generate terrain button and it will load your new terrain.
-3 This is a black & white displacement readout white being the peaks
and black being valleys any of you with previous displacement
methods in 3ds max will recognize this
-4 this is the rendering detail button on the render options menu to
vary from low to high poly renders.
-5 This is the final render thmbnail preview.
3. Copy my settings then render then varying on what you want experiment fom there.



