A painter draws a continuous line on canvas that seems to disappear when viewed directly but appears when glanced at sideways. What is the technique used?
Category: Story · Difficulty: hard
Hint: Look for effects that trick the eye depending on viewing angle.
Answer
Aniridia-based optical illusion painting
Explanation
Certain illusions exploit perception, causing lines to vanish or appear based on how light hits the surface.
This is a hard story riddle — a tricky one that takes a little thought. The answer is Aniridia-based optical illusion painting.
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