Of course that issue will be addressed. This was a quick hack. 2D screen(without rotation as it is now) is a simple rectangle that can always be entirely covered by 3x5 tiles of size 256x256. To properly support rotation and 3D with perspective I need to calculate an trapezoid and minimal set of tiles covering it entirely. There is some math that needs to be done before 3D will be usable. Tile engine in CloudGPS also has to be reworked to manage that efficiently. I have it all sorted out but I just need time to code it.