Another version !
wonderfull especially that muddy water...
PS, trees seem to be black or had a dark very dark green ;aren't they ?
It is true that these trees are very dark. I added a enviro light “occlusion” of which I reduced the parameters but it is not conclusive!
Great pov, but try having 2 enviro lights: 1 AO, 1 GI and play with the strength on surfaces (try reducing it at first) - introduce a lot of transparency into the trees' needles.
I like what you've got there so far. But I'd be tempted to break up that strata a little, looks too regular and repetitive. The tree population looks good, and know you'll be able to sort the materials out. I'd also be tempted to throw in some more browns and greys into the rock texture.