Yes, exactly. Iam sorry for my english. Yes, like a box without bottom and the top, but in the shape of the real world, so not a simple cube. I know how to do that, so there are no problems. But i dont want import that as one mesh, its too big. So i splitt that border in many parts, but if import all of them, i got a total size of 30 x 15 km. So i ask me, is that too big for a whole level. For example, the player position is X: 15.000.000 Y: -5.000.000