🫁 Breathing Square
Does the yellow square look like it is expanding and shrinking? Use the tools below to reveal the impossible reality of what you are actually seeing!
🧠 The Aperture Problem
When the background corners are visible, your brain thinks the square is pulsing in size. But the square is completely rigid. It is simply spinning in place.
This is a famous flaw in human vision known as the Aperture Problem. Because the dark blocks hide the corners of the square, your eyes can only see the straight edges sliding across a gap. Without the corners to act as reference points for "rotation", your visual cortex misinterprets the sliding diagonal lines as the entire shape expanding and contracting!
When you click "Show True Outline," the red dashed line proves that the dimensions never change.