[zipzapp]

I tried to write a similiar program, but yours work! Would have saved weeks and a lot of grey hairs in my Alpen map. - Seems that you set the water to the same height till a special height difference is reached. Would it be possible to lower this difference, best to "1"? I think you change the height of the riverbanks too. If the height jumps were lower, the "canyon-effect" might be lesser and some slope river sections might be corrected.