The musical trainspotters at http://everyone.doesntexist.com mixed a new soundtrack for La Planète Sauvage (Fantastic Planet), the 1973 surrealist SF animation by René Laloux and Roland Topor. It’s a strange film made even more psychedelic with the sounds of Aphex Twin, Matmos, Venetian Snares, and other composers.

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Its just over an hour long. I remember watching the original but this remixed version is excellent.