Commissioned by the Galeria Maeght for a 1974 exhibit at the Grand Palais in Paris, Miró, the Forge shows all phases of creation for the artist's bronze sculptures Puertas Mallorquinas. Portabella's sharp cutting around the kiln evokes montage films like Coal Face (1935), but he also finds opportunities for the elegant camera movements that distinguish his fictional features. The longest of Portabella's collaborations with Miró, the film also offers the greatest insight into his production process.