Hey all,
Im not sure if anyones already found this out, But if You render a birds eye view of your land where the water will be (without it being there), then Add a Default Shader and use it as the input to the water shader for say a lake you used, Then use the render you made for transparency, you should get a nice effect with it (im still rendering my version) Also if you Change The Reflection and relfection tint to a lgiht blue, this makes it look extremly realistic