Danpiker

This illusion was new to me. Does whichever dot you look at turn more purple? Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision. https://www.schulz-hildebrandt.com/9-purple-dots-illusion/ https://arxiv.org/abs/2509.11582

@ylegall@genart.social It is possible to keep it clean at the origin

@robinhouston@mathstodon.xyz Thanks! I'll try and do a little write-up soon.

@futurebird@sauropods.win Yes - it's a very nice video. There is indeed a link - complex analysis. One way of generating these square tilings is via discrete harmonic functions.

@glocq@mathstodon.xyz @csk@mathstodon.xyz these quadrilaterals need to be both equidiagonal and orthodiagonal.

@Natanox@chaos.social @ApostateEnglishman@mastodon.world @Pikestreet@ohai.social @conchoid@mastodon.gamedev.place It's definitely screen dependent, and not just because of the size. On my desktop monitor the effect is completely absent for me, while on my phone it is very strong, even at a distance where they are the same apparent size.