I have done similar tricks with Terragen 0.9x for terrains in Imagine3D with the added benefit that if you want a terrain from terragen there's a plug in that saves them out as .lwo and is quite good tho very hi res. If I can locate one still on my drive I as well will try to post a sample....great exploratory thread folks.. ...

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again