Closely related is "Opt Art": * Examples: https://www2.oberlin.edu/math/faculty/bosch/tspart-page.html https://www2.oberlin.edu/math/faculty/bosch/tspart-page.

Closely related is "Opt Art": * Examples: https://www2.oberlin.edu/math/faculty/bosch/tspart-page.html https://www2.oberlin.edu/math/faculty/bosch/tspart-page.html * Paper: https://www.tandfonline.com/doi/abs/10.1080/10724117.2006.11974624 https://www.tandfonline.com/doi/abs/10.1080/10724117.2006.11... (find it online at the usual places) * Book: https://press.princeton.edu/books/hardcover/9780691164069/opt-art https://press.princeton.edu/books/hardcover/9780691164069/op...