His film work was interrupted for a short time because of his entry to the military. He was assigned as a war correspondent to the West and East front before he was suspended from the military for his cooperation for the movies "Stukas" (1941) and "Besatzung Dora" (1943). He used the opportunity and also worked for the special effects for the colourful costume movie "Münchhausen" (1943), where he was responsible for the sequence with the superfast runner and with the long-distance gun.