The study is focused on work and cooperation of five young stage designers/architects with director E. F. Burian in the avant-garde theatre of Divadlo D in its beginnings in early 1930s, namely César Grimmich, Miroslav Kouřil, Jiří Novotný, Karel Poličanský, and Josef Raban, and then mainly the trio KNR. The main part depands on presentation theirs working methods and themes, which reflect new techniques of visual art, focused on light experiments, photography, film and raw materials. Their methods are also confronted with work and experiments of László Moholy-Nagy