while the beams in the bottom half are drawn as if viewed from below, again with a crossing consistent with that point of view. This internal consistency of the top and bottom halves of the drawing is a reflection of the impossible tower that forms the main subject of Escher's print, whose interlaced pillars again look consistent if one views only a single floor at a time.

Other artists than Escher, including Jos De Mey, have also made artworks featuring an impossible cube.A doctored photograph purporting