Due to the requirements of filming in an "alternate reality," as well as different seasons, the exterior set was extremely adaptable. RKO studio's head of special effects, Russell Shearman, developed a new compound using water, soap flakes, foamite, and sugar to create "chemical snow" for the film. Before then, movie snow was usually made from untoasted cornflakes, which were so loud when stepped on that dialogue had to be redubbed afterwards.
Due to the requirements of filming in an "alternate reality" as well as different seasons the exterior set was extremely adaptable RKO studio's head of special effects Russell Shearman developed a new compound using water soap flakes foamite and sugar to create "chemical snow" for the film Before then movie snow was usually made from untoasted cornflakes which were so loud when stepped on that dialogue had to be redubbed afterwards