Optical illusions

[Mendel]

Metabunk has a tag for optical illusions, https://www.metabunk.org/tags/optical-illusion/ , but all 4 threads in it are rather specific.

Optical illusions are interesting for us because they demonstrate how "normal people" (aka all of us) can be mistaken about what they're seeing; and that is a major reason why we can't rely on witness reports alone.

Source for these is
https://imgur.com/gallery/illusions-1VRl3k9
Imgur is currently blocked in the UK; I've put some of the files in the spoiler below. On the imgur embed, there's a right arrow that appears near the right edge that you can use to browse the image set; or click through to imgur to scroll.

This is from the comments:

Spoiler: Illusions from the imgur post

 

[GM4AJK]

Similar to the tower illusion

 

[Ravi]

Ah, yes. I drew a similar illusion a while ago:

 

[Mauro]

This is from the comments:
View attachment 93608

I had never seen this one and it's amazing, I had to copy the image in an editor and play with it, it works also with multiple copies:

(I wonder what would happen at infinity )

 

[JMartJr]

I had never seen this one and it's amazing, I had to copy the image in an editor and play with it, it works also with multiple copies:

Interesting, to me it falls apart when I scan my eyes across it from side to side, as each pair that becomes the pair closest to the center of vision looks less extreme, and more like what the original "just two pictures" illusion. But that's maybe just me...

 

[Mauro]

Interesting, to me it falls apart when I scan my eyes across it from side to side, as each pair that becomes the pair closest to the center of vision looks less extreme, and more like what the original "just two pictures" illusion. But that's maybe just me...

What I see is the road in the leftmost picure is a little inclined to the left, in the second picture it starts leaning to the right, and leans more to the right in each following picture. And I can't avoid seeing it that way,