entheogenic interpolation, n.

/ˌɛnθiːəˈdʒɛnɪk ɪnˌtɜːpəˈleɪʃən/

Etymology: < entheogenic adj. (from Greek entheos ‘inspired, possessed by a god’ + -genic) + interpolation n. (from Latin interpolare ‘to alter, refurbish’).

The process of constructing a complete visual representation of a psychedelic experience from the fragmentary data that remain accessible to ordinary consciousness after the event; the treatment of residual impressions (colours, geometries, entities, partial utterances) as sparse coordinates from which the missing dimensions of the experience are inferred and rendered in material form.

Freq. used of a practice in which an artist does not illustrate a reported vision but completes it, producing a work that stands as the finished sentence the experience itself began.

Also (in commercial and studio contexts): the resulting artwork.

2010s– in specialized use among practitioners of visionary and psychedelic-inspired art; more recently adopted as a formal designation for a method of commissioned portraiture of non-ordinary experience.