The cinema thus was an obvious source. At the same time, the rich formal and narrative inventions of the only genuine 20th-century art inevitably encouraged parallels with current architectural thought. Flashbacks, crosscutting, jumpcuts, dissolves and other editing devices provided a rich set of analogies to the time-and-space nature of architecture. Yet the concerns of the Screenplays were essentially architectural. They dealt with issues of material (generators of form: reality, abstraction, movement, events, and so forth), device (disjunction, distortion, repetition, and superimposition), and counterpoint (between movement and space, events and spaces, for example). The Screenplays aimed at developing a contemporary set of architectural tools.