Grass "Klas" - Fake Stones - Transparency Shader -
looks neat!....did you use soft shadows?...maybe increase blur radius?...the shadows seem a little too sharp under the water surface?...still has the makings of a great scene!
I agree with inky. Something about the water horizon looks unreal. I wonder if your transparency depth is too much or your water density is not enough.
Bon boulot!!!