Impossible Rectangle 3D Optical Illusion

Are the holes on the front or inside?

See Another Random Optical Illusion

Explanation

The optical illusion uses the techniques of overlap and perspective angles. The “U” shape created on the left side does not continue to the right because the perspective angles are different there. On the right side, those angles make us see the “U” shape differently.

You can actually see this optical illusion three different ways. Keep trying.