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Bulging - Checkered Illusion:
The article that introduced this illusion for the first time:
Kitaoka, A. (1998). Apparent contraction of edge angles. Perception, 27, 1209-1219. [länk]
1A - 1D: Elegant Title:

Demo:

1A

1B

1C

1D
2A: Elegant Title:

Demo-2A:

2A: Elegant Title:


Demo-2B:
- Date: Jun 28, 2022 [2B].
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