Which Horse Is Standing in Front

same direction, the apparent depth of the image becomes easier to understand.

Why Is This Puzzle So Confusing?

The difficulty comes from the way our brains interpret visual information.

When we look at an image, our brains constantly try to determine depth, distance, size, and position. We normally do this automatically without consciously analyzing every detail.

But an optical illusion can introduce conflicting clues.

A shape may look as though it belongs to one horse while its position suggests another. Overlapping features can make the foreground and background difficult to