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World 5 · Impossible Objects and Ambiguous Pictures · 8 min · PRO

Figure and ground: Rubin and Necker

One picture, two readings

PRO · Illusion Lab

World 5: Impossible Objects and Ambiguous Pictures is part of PRO

The first world of Illusion Lab is free. PRO opens the other 24 lessons in 6 worlds — simulations, quizzes and all.

  • Gestalt: the whole before the parts
  • The Penrose triangle
  • Illusory contours
  • How fast are you?
  • Apparent motion and the waterfall effect
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  • All 60 labs — every world, every lesson
  • Practice exams and certificates

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← Gestalt: the whole before the partsThe Penrose triangle →

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