I'll be back on my Windows system soon so I'll get that last file but I'll remove some of the rock colouring, there is something else going on there. I want to keep the files simple. It's really just the previous file with one step slightly altered, then water and colour added. One thing that is making my renders look bright and crisply lit (at least when I get to adding any colour) is some post processing in an app called Lightzone. It has some fantastic algorithms for relighting scenes. Especially great for landscapes where lighting differences are extreme. Same goes for TG2 - if you are replicating the real world of cameras and photos.
You will see that the water roughness has very small values. This all depends on the scale of your scene (I'm not even sure exactly what kind of scale things are in these scenes) but most of the time water only needs very small values of roughness to be effective unless it is an open ocean.