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explain.

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Originally posted by: dighn
Originally posted by: cain
you took a piece of napkin, cut two holes and superimposed it on your screen?

yeah...

hmmm did that, the B block is slightly lighter than A, but i suppose that's because i didnt block out the entire screen

edit: yeah they are the same
 
lol ... another proof 😛

Text

I even pasted the B square in the middle of other squares so you can see the affect that the surrounding squares have on your perception of the color.
 
Here thou goest.

Go here has a complete explantation and covers and everything.

http://www.michaelbach.de/ot/lum_adelson_check_shadow/index.html

You will, in all likelihood, perceive the above picture as a 3-dimensional scene, where a greenish cylinder stands on a checkered pane; light comes from top left. Now try the 2 buttons on top right. Two patches will be indicated, judge their relative brightness. A second later the patches will be isolated out of their context and now the brightness will be identical, luminance was identical all the time.
 
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