I've seen that graphic before. She's not spinning on this page for me. Another illusion?
I remember seeing a video of part of Flatland as a child. Or maybe the characters in Flatland were just being ...
It is an optical illusion. There are other versions—silhouettes (cast shadows with depth cues removed)—and most people tend to see one direction or the other.
With a little practice, you can switch between the two interpretations. It's distantly related to pareidolia, where the brain is trying to match a pattern and fills in depth cues that don't actually exist.
So yes, it is an "illusion," but it's odd that you don't see it.
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Yes, the ingress of higher dimensions into ours is a theme of Terence McKenna's work, which he calls "concrescence." DMT and psilocybin can evoke a sense of entering higher-dimensional spaces.
In effect, the fable of the blind men and the elephant is an example of this, in the sense that they are interacting with a folded 2d surface where each one is apprehending a different part, which is cognate with being unable to see the dimensions of the source, eg, the silhouette or shadow that you don't get the depth enhancement from your visual cortex.
With a little practice, you can switch between the two interpretations. It's distantly related to pareidolia, where the brain is trying to match a pattern and fills in depth cues that don't actually exist.
So yes, it is an "illusion," but it's odd that you don't see it.
---
Yes, the ingress of higher dimensions into ours is a theme of Terence McKenna's work, which he calls "concrescence." DMT and psilocybin can evoke a sense of entering higher-dimensional spaces.
In effect, the fable of the blind men and the elephant is an example of this, in the sense that they are interacting with a folded 2d surface where each one is apprehending a different part, which is cognate with being unable to see the dimensions of the source, eg, the silhouette or shadow that you don't get the depth enhancement from your visual cortex.
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