Tonal value illusion

Tonal value illusion
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Good gracious - what an eye-opener! Thank you very much for this illuminating video. Shelley

That just show you how we could do with paying careful attention to tones. I was completely fooled by it, even now looking at it I could swear it was lighter but obviously it's not. What an eye twister!

Hang on Studio Wall
31/03/2015
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The 'dark' square is actually the same value as the light square under the cylinder; the gradated shading fools the eye; the cornsweet illusion I believe its called. I cut the dark square out in photoshop then moved it about in screncast software . Absolutely no trickery!

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Martin Kinnear

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