According to Méliès's recollections, much of the unusual cost of "A Trip to the Moon" was due to the mechanically operated scenery and the Selenite costumes in particular, which were made for the film using cardboard and canvas. Méliès himself sculpted prototypes for the heads, feet, and kneecap pieces in terracotta, and then created plaster moulds for them. A mask-making specialist, probably from the major Parisian mask- and box-making firm of the Maison Hallé, used these moulds to produce cardboard versions for the actors to wear. Though other details about the film's making are scarce, the film historian Georges Sadoul argued that Méliès most likely collaborated with the painter Claudel on the scenery, and with Jehanne d'Alcy on the costumes. One of the backdrops for the film, showing the inside of the glass-roofed workshop in which the space capsule is built, was painted to look like the actual glass-roofed studio in which the film was made.