Dunno if you want to hear it, but I think you gave away some with this scene. The way it is at the moment, I don't think it's looking good as a whole (apart from the water itself and the cloud), and here is why:
- the saturation is exaggerated. It's particularly noticable in the blue of the sky
- It looks like you have also made excessive use of the shadow and highlight tool in PS or something similar. I can tell from the glow in the blue that matches the outline of the mountain.
- one would expect a little more blur in the distance, but the outline of the mountains is too sharp
- the use of fake stones that pop out of the water: there are too many of them in the distance, so that towards the horizon, they look like a solid terrain. I suggest the use of a distance shader to blend them out when far away. It would also be advantegeous if they had slightly varying surfaces.
The good news is, that you can improve on all of this with only very minor modifications to the scene and in PW.
Cheers,
Frank