Post: #10

Map wise it would be as simple as changing the numbers from 0 to 1 and 1 to 0 in your sphere.ini and doing the same in your map scripts.
That however would obviously cause issues with decorations, houses e.t.c.. in your save file as they would then still be showing as beig on the same map number, though the map would have changed.
You may be able to edit the saves to move the things around though it's likely to be easier to write a function to do it. Either way, depending on the complexity of what's in your world, it's going to be a headache.