An interdisciplinary experiment on dream imagery -- Experimental methods -- Artistic experiment: surrealism and the boundaries between subconscious dreaming and reality -- Penetration of the boundaries between dream and reality -- Quest for archetypal manifestations of subconscious impulses -- Use of collage to make incongruities compatible -- Conclusions from the artistic experiment -- Psychological experiment: the problem of other minds and the visual content of dreams -- Connections between emotions underlying a dream and visual aspects of the dream -- Connections between symptoms of psychopathology and visual aspects of the dream -- Conclusions from the psychological experiment -- Artists' verbal descriptions, interpretations, and digital images of their own dreams