Detail from [link] with the contrast upped. (Full view, please).
When painting semi-chaotic random textures like clouds, my mind will "recognize" shapes. Like a Rorschach ink blot. The shapes can be birds, faces, letters, symbols or geometric designs. Thus "The Tapestry of Rorschachery" emerges.
M.C. Escher and Leonardo Da Vinci would use this tapestry for inspiration.
From page 100 of _Escher on Escher_, Escher writes: "... I found one suggestion in the writings of Leonardo da Vinci. This is the fragment, translated as best I can: 'When you have to represent an image, observe some walls that are besmeared with stains or composed of stones of varying substances. You can discover in them resemblances to a variety of mountainous landscapes, rivers, rocks, trees, vast plains, and hills. You can also see in them battles and human figures, strange facial features and items of clothing, and an infinite number of other things whose forms you can straighten out and improve. It is the same with crumbling walls as it is with the sound of church bells, in which you can discover every name and every word you want.'"
Can you find the image of Leonardo Da Vinci in the clouds above?
I have used just this process to find every Escher-like tessellation I've invented. In _Escher-like Monkeys_ the monkeys move from abstract two dimensional tessellations to realistic three dimensional creatures much like the lizards in Escher's print _Reptiles_. [link]
The octahedron/tetrahedron structures the monkeys are related to the structure in Escher's print _Flatworms_. [link]
Escher-like-monkeys [link] is a tribute to Escher in a number of different ways.
I like the speculation that our visual system is always making up patterns, and the sensory data we get "pushes" these patterns into some kind of closest match, sort of like video feedback. Oliver Sachs has an interest in this too, here's a couple quotes about pattern generation, in particlular the first one about very regular tesselation-like patterns.
[link] is an attempt to portray something that was almost blinding me a few weeks ago. But for me these flashing patterns never precede headaches, thank God.
The flashing colors seem like a different phenomenon from the tessellations and geometric designs seemingly embedded in random textures. I used to see those a lot in my misspent youth when I'd indulge in illegal substances. I've been sober for decades but I can still bring them forward with an effort of will. They also come forward when I've gone longer than 24 hours without sleep.
Feed back is an interesting speculation. I've seen interesting designs resulting from a video camera aimed at a TV screen. Sometimes these resemble the geometric designs my brain manufactures.
Is it possible a layer of neurons in the brain contain visual data enhanced with pattern recognition routines? I like to imagine a science fiction scenario where sensors in the brain record a raster image from this layer and then display the image on a screen the subject's viewing. That could make for interesting feedback.
Leonardo is above Jerry, Jerry's part of Leo's flowing white hair and beard. His bald pate is pointing in the general direction of the red monkeys.
That's a very typical portrayal of aura. These are usually interpreted as a narrow (~3mm) chemical density wave across the primary visual cortex (unilateraly) that suppresses neuronal activity. I'm betting it started near the center of field of view and traveled to the periphery over the course of 10-30 minutes, posterior to anterior over the cortex.
Be aware that aura and headaches are only a couple symptoms of migraine illness/syndrome.
I can trace my (infrequent) aura on paper while they are happening, staring at a fixed point. I don't perceive color like you (and many others) see, only a fast flickering of a cross-hatch pattern that obscures normal vision. And the arc is narrow, only several degrees visual angle wide.
See ~golem1's "Migraine aura", and his link to other examples. His depiction has elements of both color and cross-hatching.
Nobody knows how the brain actually performs complex pattern recognition, but it must have many "modules" (relatively independent routines), as often very specific routines go haywire. At the first level of processing, gradient orientation routines are spectacularly organized on the cortex. See, for example, this map of neuron sensitivity to line orientation These are called occular dominance columns, and they are likely screwed up by migraine aura.
Yes, I see Leo now, similar to his older self-portraits and in his style. I need to go back to these to see if I can find Jerry in his beards!
I also don't see "crenellations and filling in with periodic textures", but it is relatively common in migraine aura. O. Sachs book "Migraines" includes a few first hand depictions of this phenomena.
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This is often called pareidolia, seeing definite forms in ambiguous stimulii. Here's a good example in a non-random image.
I like the speculation that our visual system is always making up patterns, and the sensory data we get "pushes" these patterns into some kind of closest match, sort of like video feedback. Oliver Sachs has an interest in this too, here's a couple quotes about pattern generation, in particlular the first one about very regular tesselation-like patterns.
The flashing colors seem like a different phenomenon from the tessellations and geometric designs seemingly embedded in random textures. I used to see those a lot in my misspent youth when I'd indulge in illegal substances. I've been sober for decades but I can still bring them forward with an effort of will. They also come forward when I've gone longer than 24 hours without sleep.
Feed back is an interesting speculation. I've seen interesting designs resulting from a video camera aimed at a TV screen. Sometimes these resemble the geometric designs my brain manufactures.
Is it possible a layer of neurons in the brain contain visual data enhanced with pattern recognition routines? I like to imagine a science fiction scenario where sensors in the brain record a raster image from this layer and then display the image on a screen the subject's viewing. That could make for interesting feedback.
Leonardo is above Jerry, Jerry's part of Leo's flowing white hair and beard. His bald pate is pointing in the general direction of the red monkeys.
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NOW NO SWIMS ON MON
The Exquisite Corpse
The Surreal Arts
Hop's Gallery
Be aware that aura and headaches are only a couple symptoms of migraine illness/syndrome.
I can trace my (infrequent) aura on paper while they are happening, staring at a fixed point. I don't perceive color like you (and many others) see, only a fast flickering of a cross-hatch pattern that obscures normal vision. And the arc is narrow, only several degrees visual angle wide.
See ~golem1's "Migraine aura", and his link to other examples. His depiction has elements of both color and cross-hatching.
Nobody knows how the brain actually performs complex pattern recognition, but it must have many "modules" (relatively independent routines), as often very specific routines go haywire. At the first level of processing, gradient orientation routines are spectacularly organized on the cortex. See, for example, this map of neuron sensitivity to line orientation These are called occular dominance columns, and they are likely screwed up by migraine aura.
Yes, I see Leo now, similar to his older self-portraits and in his style. I need to go back to these to see if I can find Jerry in his beards!
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Just pass the cheese please!
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