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3 thoughts on “An Optical Illusion”

  1. 와– 신기하네요.
    프린트해서 gray scale로 봐도
    돌아가네요–

    어떤 원리를 이용한거죠?

    p.s. 눈팅만하다가 슬쩍 커밍아웃합니다 ^^

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