3DWarehouse
Optical Illusion - Ehrenstein illusion
by 3DWarehouse
Last crawled date: 3 years, 6 months ago
Is the green figure a square? Created for Google SketchUp open challenge #7 When a square is placed in a pattern of concentric cirles, the sides appear curved. #Ehrenstein #illusion #Openchallenge7 #Optical_Illusion