Just a note if you are using Maya 4.5 and mental ray
From the visor import the scene that has a mountain range called 'Terrain' (found under fluid examples>bottom folder) into the current scene by right clicking and importing.
Render the scene (through the 'Terrain Cam') 640 480 using standard Maya renderer.
Click the button in the render view that enables you to 'keep image',
render scene again with Mental ray renderer using production quality via the mental ray render options.
the difference is quite astounding. the maya one (youll agree looks cool) but the Mental Ray render looks kind of eery and real.....
Try this with your 'terragon' scenes as well.
Mayan elder......only in years.....