I don't think you're right about that but heck, I'll give it a try

Actually it's harder than I thought! I've tried combinations, sizes and shapes but I'm afraid tha it can only be done with two different image sets.

You see if the guys can make the background rotate, and in order for it to be loopable in both modes, the result is probably an impossible shape!

e.g. let's say we are in landscape desktop 2 (800x480) and rotate to portrait (480x800) then scroll to desktop 3 in portrait mode and rotate back to landscape. That seems, so far, impossible to achieve with one image set.

I will look more into it tomorrow because I am dead tired and the heat is unbearable