Figure 6.

Demonstration of illusory contours which create the clear perception of Gestalts. The so-called Kanizsa triangle named after Gaetano Kanizsa (see Kanizsa, 1955), a very famous example of the long tradition of such figures displayed over centuries in architecture, fashion and ornamentation. We not only perceive two triangles, but even interpret the whole configuration as one with clear depth, with the solid white “triangle” in the foreground of another “triangle” which stands bottom up.