Akiyoshi's illusion pageshttps://www.ritsumei.ac.jp/~akitaoka/index-e.html
5 4 3 2 1 Visual phantoms (ECVP2005) Pincushion grid illusion of neon color spreading <trompe l'oeil> Ambiguous (Reversible) figures 8 7 6 5 4 3 2 1 Impossible figures 2 1 U
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