when using a debug stick on a singular wall (one with none on any of its sides) and you set "up" to false it makes it disappear. even its hitbox disappears. also, lets say you had a line of walls from north to south. if you set north and south on all of them to none, you get them to disappear (except for the ends which can use the "up" trick.) its not that important but it exists, just letting you know