Ok, I think I would definitely call this "The NWDA Effect" I new I liked that phrase the second I read it.
You should run with it Frank!

Took me a minute to figure out that I had to connect the compute terrain over to the top of Seth's stack, After trying to load a heightfiels. Error!! At least there was no MS noise.

Tried a couple of times and realized it was like a boole and hooked D's stack to A and in color I subtracted, that left Seths only, I guess.
I'd be interested to see what you come up with Folder as far as your tweaks permit.
Anyway, back to the NWDA effect, it allows me to keep tinkering with modeling, cause I can reach over and grab that insane Frenchies and now Dandel0's shader, not to mention NVSEAL's planet if I need an orbital render!! Thanks Guys!
http://www.terragen.org/gallery/displayimage.php?pos=-6199