Underground Piano 1984 - Shigeo Fukada (1932-2009) More of Fukuda's illusions can be found here . The site has several videos of his 3D optical illusions including models based on Escher's drawings. Some of Fukuda's work is featured in Masters of Deception, a book on the art of optical illusions . Ellipses plein vide, rouge et blue 1996 - Felice Varini The above picture looks like someone touched up a photograph. But you can see what it really is... More of Varini's work can be seen here . It's amazing how our eyes can deceive us. You can come up with your own spiritual parallels, but I couldn't help thinking that by nature, man is a master of deception as well, self-deceived and a deceiver of others. Send out your light and your truth ; let them lead me; let them bring me to your holy hill and to your dwelling! Psalm 43:3 (ESV)