Seeing that gravity hull messes with water, it's either that or Resource Burner, because im not really away what it is.
I don't think its gravity hull since the only thing it does to prevent water from messing you up is creating another version of the prop far out from the rest of the map, but rendering it as if you were in the normal one.
The problem might be missing textures, what games are mounted to your Garry's Mod right now?
