tahgtahv 
A true penrose square has 4 distinct sides, whereas the left one here has 2 and the right one has 1 (it is a 3D mobius strip)
Posted on 2/23/09 9:36 AM

lucgyver 
cool
Posted on 4/25/08 9:35 PM

luweewu 
I'd like to separate them, but they just don't look right. :-) Nice Escher effect.
Posted on 2/14/07 10:35 AM

dutchrobbie 
nice 3d-effect
Posted on 2/14/07 1:14 AM

magicwoodster 
Magician's nightmare. Linking Escher Rings. lol
Posted on 2/13/07 9:04 PM