I agree w/ sonoma9 's comment. The piping gel would make an amazing water effect. I have a cake in my photos done with piping gel for a fisherman on the river, but it's not NEAR as beautiful as this one you have done. I know a lot of the times I am very critical on myself, but then when Non-Cake-Decorators see my work, they don't notice the tiny little flaws at all! Keep that in mind, it looks Amazing to them any way you do it, because most people wouldn't even know...