Some images of the psychedelic;

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Psychedelic imagery is arguably a form of hallucination. However, the above images were obtained by a combination of
saturating and blowing up an original clear picture. Refracted light, occurs  in nature by a well established physical
process. This is one explanation for why psychedelic effects are more easily detected in the outlines of shapes and within the
contours of foliage and trees.  Another explanation is the sensitivity of the eye of the observer, the use of certain hallucinogenic
drugs, such as psilocibine, which occurs naturally in various forms of wild mushroom, being to increase such an optical sensitivity,
through detraction of the retina. In this sense, such hallucinations are physically real, though, perhaps, not normally,
though naturally, observed. This is in contrast to the more commonly accepted meaning of a hallucination, as being a thought
process, which cannot possibly bear any resemblance to physical reality. In the latter images, the effect  of diffraction
is explored in the blurring quality of light.