Here's a simple yet surprising optical illusion that can be made within minutes. It involves four different shades of blue that border each other. The shades go from lightest to darkest when viewed from left to right. The illusion comes into play when an object is placed along the borders of each successive shade. Something strange occurs with our perception of the obvious difference in shades. In fact, neighboring shades appear to be precisely the same! Here's a video that showcases the full effect of the illusion:
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step 1What You Need
Sometimes simple is better. For this project, only the following items are necessary: 1) A sheet of 8.5" x 11" paper 2) Scissors 3) Pencil 4) A program that you can …
step 2Creating the illusion
This is extremely easy to create by using a drawing program. I used Photoshop CS3, but that is entirely unnecesssary. MS Paint is sufficient for this. I will show how I …
step 3Presenting the Illusion
Now that a finished product is in hand, it's time to present the illusion to yourself and/or to others. This is the best part!! Place the pencil over the transition bor…
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http://www.instructables.com/id/Shady-Optical-Illusion/