In a gallery, a painting appears to change its features each time someone looks away. What must the curator uncover to prove this phenomenon is a setup?

Category: Mystery · Difficulty: hard

Hint: Think about how illusions can be created in art.

Answer

Look for hidden mechanisms in the frame

Explanation

Hidden mechanisms could be manipulating the painting to create the illusion of change.

This is a hard mystery riddle — a tricky one that takes a little thought. The answer is Look for hidden mechanisms in the frame.

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