This was going to be my entry for a local photo contest in the digitally altered category but it was due three days ago.
This is partially based off of many a classic riddle which begins with hypothetically being in a room with no doors or windows. This is also of course after an Escher print. can anyone name which one?
Created from portions of two transverse equirectangular panoramas, one of which was taken by holding a tripod to the ceiling. Don't try viewing this in an immersive viewer though, it's not 360x180 degrees (cropped for composition's sake)