This is a so-called "impossible object."
This means that it's impossible to build it.
But drawing it is not impossible, as you see in the image.
All the bumps are identical.
the image to the right is rotating.
Perpetually ascending staircase—how can the man go up all the time and come back to the same place over and over?
Trying to figure this out can give you a headache!
The red squares are the same color
in the upper part and in the lower part of the "X"
The diagonal lines are parallel.
There are no gray spots at the corners of the squares.
Parallel lines at sunrise
The center circles are both the same size.
The vertical lines are both the same length.
There are no black dots.
The rows of black and white squares are all parallel.
None of them slope.
Are the vertical blocks parallel or straight?
Optical Illusions Pages
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