https://www.quantamagazine.org/a-math-theory-for-why-people-hallucinate-20180730/
Druggos please confirm whether or not youve see them. 
The paper is called What Geometric Visual Hallucinations Tell Us about the Visual Cortex.
Your brain does secret coordinate transforms it turns out
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https://www.quantamagazine.org/a-math-theory-for-why-people-hallucinate-20180730/:
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What Geometric Visual Hallucinations Tell Us about the Visual Cortex:
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