After this he joined Heimrad Prem, Lothar Fischer and Hans-Peter Zimmer in founding Gruppe SPUR, which in 1959 entered the Situationist International.
He had a six-month scholarship in Paris before returning to Munich for the SPUR exhibition in Galerie van de Loo.
He collaborated with Hans Platschek, Asger Jorn, Jørgen Nash, Constant, Maurice Wyckaert, Giuseppe Pinot-Gallizio and Guy Debord.
After the SPUR group was expelled from the Situationist International, they continued to do collaborative work, linking up with Wir in 1966 to form Geflecht.
Sturm developed colorspatial anti-objects and had his first solo exhibition in the Galerie van de Loo, Munich.