1. Smith-Kettlewell Institute
The
Impossible
Illusory Triangle
Christopher W. Tyler
Smith-Kettlewell Institute
San Francisco

2. The Impossible Illusory Triangle
The Kanizsa illusory triangle is a negative object defined only by its occlusion of background elements. The Penrose impossible triangle is the image of a three-dimensional structure that cannot be interpreted as a physical 3D structure, but has fluctuating, inconsistent 3D interpretations.
The new illusion combines these two illusory effects with a third one, in which the Kanizsa triangle is created by dynamic occlusion to form an inverse anorthoscopic effect. The concatenation of a dynamic Kanizsa triangle with a simple three-line figure generates a full Penrose triangle with a continuously fluctuating depth interpretation.

3. Penrose Impossible Triangle
Richard Gregory ( )

4. Imaginary (Inverse Anorthoscopic Illusion) Triangle

5. The Impossible Illusory Triangle

6. The Impossible Illusory Triangle

7. The Impossible Illusory Triangle

8. The Impossible Illusory Triangle