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Psychedelia's tropes attempt to convey the psychotropic by finding visual metaphors for it, that while kaleidoscopic and tremulous in their own right merely find analogy for what are the very distinct slippages in perception that drugs produce - drawing the carpet melting isn't the same as experiencing the carpet thawed to run under feet sinking quite rapidly into it - the experience vs the concept, the difference between, say, photography and Cezanne, two poles between which van Lankveld has fluctuated for some time before finally clubbing one far end hardly with the clouds, with this particular painting.
