In summer 1923 via Werner Graeff he met Erna Niemeyer, then a Bauhaus student who just finished her second year in Weimar, and who undertook to animate his Symphonie diagonale [Diagonal Symphony] scrolls[21]. At this point, Eggeling abandoned the Horizontal-Vertikal-Messe entirely. For over a year, the two worked on a new film in his studio flat, in appalling poverty. The Ascania-Werke placed some of the necessary apparatus at his disposal, and one of their engineers, who was interested in Eggeling's film experiments, used to help him when some detail in the technical equipment did not function as it should. At the beginning of the experiments the separate elements of the composition were cut out of black sheets of paper, but later tin-foil was used, which proved more suitable. The film was made by the usual technique for animated film, ie. single frame exposures (stop-motion photography).[22] ...
https://monoskop.org/Viking_Eggeling (18.01.2021)
