of course a sphere works think about it logically if you travel along the surface of a sphere in any direction you'll end up back where you started the problem is simply a matter of perspective by comparing it to traditional maps of earth you're getting nowhere to make all directions loop properly all you have to do is stretch the sphere flat while cutting only a single point in it let's use the north pole now stretch it out into a square the entire perimiter of the map is the north pole while the south pole is in the center on a sphere moving over a single point in a strait line causes you to come out on the other side of that point on this version of the map since the perimeter is a single point you always come out on the other side