Invocation originated as a sequence within the documentary Orpheus Through the Ages made by Pelicula Films to accompany Orpheus and Eurydice. It was designed to illustrate the Ancient Greek myth of the Creation of the world. It was shot on 16mm and subsequently enlarged onto 35mm for festival screenings. The techniques employed were a test run for those which ultimately were used within Ra; the Path of the Sun God. Two versions exist; one with narration and one without.

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