Justice Frimpong - Ignis faatus - Zöllner Illusion

The project did a good job in explaining what exactly the optical illusion was, giving a detailed account of attempted explanations of the phenomenon. The examples given were good at showing how the illusion appeared in real world examples, but the media examples could have gone more in how exactly the effect was leveraged to enhance the work.

That aside, I was wondering if there's any connection between this illusion and the spiral illusion, as they both seem to be caused by our brains extrapolating information from colors and angles.
http://www.ritsumei.ac.jp/~akitaoka/uzu-e.html

Hello!

While this project did a good job of condensing the explanation of the phenomenon in a concise way, I was left a little uncertain about the scientific technicalities behind why we try to see 90 degree angles, or why the illusion fails when the smaller lines are of equal red and green values (what does that mean exactly either?). In addition, I would've liked to see a bit more elaboration on the acute-angle expansion/contraction, which seem paramount to unraveling the mechanisms underlying the Zöllner Illusion.

Actually, going through this project suddenly reminded me of a phenomenon I learned about in a high school psychology class which really intrigued me. After some Googling, this phenomenon is called the vertical-horizontal illusion, which reveals our tendency to overestimate the length of a vertical line relative of a horizontal line of the same length. This illusion also has much to do with how we interpret angles, and our tendency for nice, 90 degrees; however, interestingly enough, there are studies that show cross-cultural differences in susceptibility to the vertical-horizontal illusion, as people from Western cultures and residing in urban landscapes are more susceptible to the illusion than those living in eastern or open landscapes. I wonder if perhaps the Zöllner Illusion also has such cross-cultural discrepancies?