Pinna’s Illusory Intertwining Effect

Estimation 9 December 2013 0 Comments

Pinna's illusory intertwining effect

This figure looks like a warped spiral made up of white and black squares on a gray background.  If you examine it more closely, however, you will find that it is actually made up of four concentric circles.  This illusion was first described by Baingio Pinna and Richard L Gregory in a 2002 article titled […]

Checkerboard Twisted Cord Illusion

Estimation 30 November 2012 0 Comments

Checkerboard Twisted Cord Optical Illusion

All of the edges in this image are straight and either horizontal, vertical, or at a 45° angle.  Does it appear that way to you? Edit:  I just also noticed that if you move your scroll bar up and down when viewing this image it appears to have some motion elements to it.

Moving Square Illusion

Video 11 October 2012 0 Comments

Moving Squares Illusion by Brusspup

Using an LCD screen, a transparent overlay and four yellow Post-It Notes, Brusspup creates his own version of the moving square illusion. According to Brusspup: There are 2 sets of lines moving back and forth perpendicularly but when the paper squares are placed on the screen the lines suddenly appear to be a square moving […]

Color Saturation Illusion

Color 9 October 2012 0 Comments

Color Saturation Illusion

Within the larger gray and blue squares are two smaller squares.  The small square on the left appears to be a blue or violet color while the small square on the right appears to be gray.  They are, in fact, the same color. Do they look the same to you?

Orange and Red Squares

Color 21 August 2012 0 Comments

Orange and Red Squares

The two images below present one two-headed arrow that looks to be orange in color and another that appears to be red.  In reality, the two are exactly the same color (red). The only difference between the two is the color of the border that surrounds the red squares.  The light yellow border used in […]

Four Floating Squares by Daniel PICON

Motion 30 July 2012 0 Comments

Four Floating Squares by Daniel PICON

The four squares appear to float on top of the wavy pink background.This illusion was designed by French artist Daniel PICON.

Moving Pink Square by Daniel PICON

Motion 25 June 2012 0 Comments

Moving Pink Square by Daniel Picon

Stare at the square in the middle of the design below.  Does it appear to be unstable and moving? This illusion was designed by French artist Daniel PICON.