Optical illusions have been studied for millennia. The ancient Greeks used a technique known as entasis which incorporates a slight convexity in the columns of the Parthenon to compensate for the illusion of concavity created by parallel lines. Many of the following illusions have been popularized by psychologists and artists like Ehrenstein, Meyer, Zöllner, Müller-Lyer, Poggendorf, Escher and Baartman.
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tazda lawson 12 Sep 2006
Dang!!!! More super super super designs.Joanne Harvey 04 Sep 2006
WOW!... another great one! It just FEELS good!thea walstra 04 Sep 2006
Marvellous, very clever work HendrikLoredana 04 Sep 2006
MARVELOUS WORK HENDRIKChristine brand 04 Sep 2006
Like Descending into the Womb of the Angel.