I think the good points are : the reflection of light shows a wave pattern ; the lighting looks convincing for a lagoon or some very lit sea. Nevertheless, but it's not as important as the good points, there's too much "noise" in the light. I mean it should be more clear and it looks a little dusty. The hind areas should also be a little darker for visibility falls very quickly underwater. I'm not sure I helped, but I'm certain it will be a good piece. :)