This is some really, really nice work, a lot of depth and detail. My only notable criticism would be how uniformly shiny (and not in a wet way, i.e. soft specular) the foreground rocks are. Break that up a bit, or just remove the soft specular high up and give sharper (wet looking) specular closer to the water and you have a real winner. You could also just add some procedural texturing detail on top of the image map textures.
- Oshyan