The rt erosion is on the mts. It is pretty impressive stuff, but the rivers are a result of the perlins raising the terrain around the clamped river beds. Well I'm on my way to rendering this out. Gotta shoot for tonight. Hope to have a 10K terrain fro you tomorrow morning. Fingers crossed cos 4 GB may not cut this. Not sure. May have to give you 4 5K ters. Is that ok?

monks