@calico: it appears to be deeper in the middle, yes, like gorge-formed? you´re right, it looks somehow cool......
@seer blue: hmm, I´m not sure at the moment what you mean...are you come from that I used the "make river" option? If, I didn´t use that. I only generated a highfield and chose the river as surface layer, restricted by altitude etc. I put a water shader on it, that´s right. Have to check if that what you wrote match what I have done, but I am not sure. I attach the tgd. maybe someone has time and is up to , to take a look at it, it doesn´t hurry....no prob.
Aenea