This should have been a base texture, but when swimming inside water made with this texture you get the missing texture material all over your screen. I'd think this is by custom water where the underwater texture isn't auto packed into the map and it can't find the texture needed for it. However, this is a dev texture, I don't know why this is happening. Somehow I have that file in my folders already, so I won't have this problem myself, but when turning on sv_pure 1 or with other players it is missing. Anyone know why?