I've created water using regions in WED, and all of this functions very well, but now I want the water to actually look like water. All I want is a way to add something that has a water texture on the top (or any other sides) of the region. It'd be nice if I could do it with blocks, but for some reason the PASSABLE flag for blocks was removed from the engine (yet, it's still there in WED... ugh).

People have suggested models or terrain, but you can't scale these things to any ratio. They always keep their scale ratio intact, making it very inconvenient when building levels.

Any suggestions? It'd be nice if the method also allowed for texture offset so I could make the water animate a bit, but it's not a necessity.