@Calico: do you mean the palm trees?
@Bigben: I know what you mean about the "wave zone". I tried using a darker color for it, but also wanted it to be somwhat reflective to give the impression of wetness. But instead of getting the dark color with just highlights(specularity) i got a lighter color that ruined the effect...
After that i just rendered it without that layer.
But right now i'm working on a new version with something similar to what i want and a nicer island with a beach(hopefully) and a better "transparency" effect.
Thanks for the comments!