 It was not until 1950 however that Müller devoted himself to the workshop themes intensively propagated at this time by other Fähre artists such as Karl-Erich Müller, Herbert Lange and Willi Sitte (born 1921).In March 1948, he took part in an exhibition at the Henning Gallery in Halle, together with Charles Crodel, Kurt Bunge and Karl Rödel (1907–1982).His contributions to the exhibition caused Richard Horn to describe Otto Müller as “the most interesting of the four artists in the exhibition” in the introduction to the exhibition catalogue.