Meiji Univ: The illusion that occurs in 3D solids: An interesting "three-dimensional illusion"

Meiji Univ: The illusion that occurs in 3D solids: An interesting “three-dimensional illusion”

Meiji University:

Let’s take a look at a concrete example.

This is the “arrow pointing only to the right”.

Interesting “three-dimensional illusion”:

The upper part is a solid with an arrow shape, but even if you rotate it 180 degrees horizontally, the arrow will face right instead of left.

The fun of this three-dimensional illusion

is taught by “The world of three-dimensional illusion, a voluntary course for those who are bored due to self-control.”