A change in in apparent brightness happens if you move closer and further from the screen and it happens with different various forms. Below is a figure modeled after those of Simone Gori that he called the Breathing Light illusion. (See the new page on with Breating Light examples)

 

 

And the figures do not have to be circular for the effect to occur.

 

 

 

 

 

 

 

 

 

 

 

 

There is an added motion-like effect in the stripes in the figure below.

 

 

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