For anyone who has worked for developers and has to do room area plans, this would be a great function. Instead of setting the room area computation globally at either the center/finish/etc, make each wall have its own line for area computation. Some developers want their areas to be calculated at the exterior face of sheathing, so at interior face of sheetrock or interior face of glass, instead of haveing to add all types of room seperation lines that mess up walls and give you all types of errors, build it into the walls themselves. im not sure what other people are working on, but ive never had a project where all areas were calculated by just one method of finish face of wall or wall centerline. some people will say thats what area plans are for, but we dont want to work in area plans and draw all these lines, especially when you have a very large building and walls are constantly moving