Optical Illusions Art Collection #2
Clashing Gradients
This one really starts to mess with your mind after awhile. In this
optical illusion picture, each box has a gradient that is going from
dark to light in one direction or the other. Although the vertical lines
are absolutely straight, each box will start to distort and look more
like a trapezoid pointing up or down, depending on which column you
look at. Don't stay on this page too long unless you want a headache!
Here's another subtle illusion for this (it doubles as two illusions in one!). The boxes with the dark gradient on the top and the light gradient on the bottom appear as slight trapezoids, even though they are all perfectly straight. They appear as trapezoids that have a smaller top, and a larger base. Wheras the boxes with the light gradient at the top and the dark gradient at the bottom appear to have a larger top and a smaller base?
What's going on with the second illusion? Well, it's a principle that is often used in magic tricks by magicians to cover something, and that is, that things that are white appear larger than things that are dark. If a magician wants to conceal a large area (or an architect wants to conceal a large unsighlty object, painting it as black will make it sink into the background much more!).
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