Grimrock

My guess is that you'd have to define a new tileset that duplicates everything from the existing water tileset except for its ambient sound/music. But if you do that, you'll lose the splashy water sound effects completely.

As far as I can tell, you can't do that. There's only the "underwater" boolean, if it's on you get the water surface and underwater sounds, if it's off you don't get the water surface and sounds. I need the water surface. I suppose I could make a custom water surface mesh/animation and use that.