it's mean: i use map for house in my world, map usually use for door, transport...but i use map for house, building, stair...in my world. Do you understand? why i ask this? because before i make house,floor,wall...when i build level, i spent long time to build it. But when i use map format it need short time to build...It same time to build a model very very short, before i need 1hours to build but using map format i need only 2 or 3 munite. Sorry everyone, my question not clearning....very very sorry..because i'm vietnames...i learning english not much.......so very bad....sorry