Photo-montage
Iván Aguado (lostctrl)
Impossible figure in photo montage below is based on one of Reutersvaärd's figures.
Artist's personal web site http://www.lostctrl.net
Artist's profile at Behance Network http://www.behance.net/lostctrl
The image was found at http://www.behance.net/Gallery/Impossible-forms/309890