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Three dimensional illusions, sometimes called
unstable figures, are lines put together to make
a figure in a way that makes the image appear to
come off the page. We live in a 3-dimensional
world. This means that we move from side to side
(one dimension), forwards and backwards (second
dimension) and up and down (third dimension). A
flat piece of paper is only two dimensional.
However, we can draw objects that appear to be
3-dimensional. |
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The cube below is known as the Necker’s cube and
is a 3-D optical illusion because there is no
way of knowing which is the front and which is
the back. Look at the centre the cube. |
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Which side is the front?
Is the front as shown on the cube on the
right side or is the front as shown on the cube
on the left side or is there no front at all? |
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Another famous illusion of this type is
Schroeder’s Staircase.
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