I was sent a link to a post in the uDogs forum today about watermasks on maps. Don't ask me, I don't know, but you folks that are heavy into mapmaking should know what it is. Yeah, you heard me. Here's a portion of the post from Stratman:
got a program that takes the watermask from an m2 map and puts it in a tfl...i might throw together just a water mask extracter as well...since if u dont want to use loathing for m2 to make the map...u can have still do ur water mask