Computer graphics
Bartolomiej Jurkowski (houk, OutOfLimits)
Artist's Zazzle gallery http://www.zazzle.com/gifts?ch=outoflimits.
Artist's deviantART profile http://houk.deviantart.com
The image was found at http://www.zazzle.com/optical_illusion_impossible_cube_poster-228595289634753999.