In the poetry of Breton, Paul Éluard, Pierre Reverdy, and others, Surrealism manifested itself in a juxtaposition of words that was startling because it was determined not by logical but by psychological—that is, unconscious—thought processes. Its major achievements, however, were in the field of painting. Surrealist painting was influenced not only by Dadaism but also by the fantastic and grotesque images of such earlier painters as Hieronymus Bosch and Francisco Goya and of closer contemporaries such as Odilon Redon, Giorgio de Chirico, and Marc Chagall. The practice of Surrealist art strongly emphasized methodological research and experimentation, stressing the work of art as a means for prompting personal psychic investigation and revelation. Breton, however, demanded firm doctrinal allegiance. Thus, although the Surrealists held a group show in Paris in 1925, the history of the movement is full of expulsions, defections, and personal attacks.

The major Surrealist painters were Jean Arp, Max Ernst (Ernst, Max), André Masson (Masson, André), René Magritte (Magritte, René), Yves Tanguy (Tanguy, Yves), Salvador Dalí (Dalí, Salvador), Pierre Roy, Paul Delvaux (Delvaux, Paul), and Joan Miró (Miró, Joan). The work of these artists is too diverse to be summarized categorically as the Surrealist approach in the visual arts. Each artist sought his own means of self-exploration. Some single-mindedly pursued a spontaneous revelation of the unconscious, freed from the controls of the conscious mind; others, notably Miró, used Surrealism as a liberating starting point for an exploration of personal fantasies, conscious or unconscious, often through formal means of great beauty. A range of possibilities falling between the two extremes can be distinguished. At one pole, exemplified at its purest by the works of Arp (Arp, Jean), the viewer is confronted with images, usually biomorphic, that are suggestive but indefinite. As the viewer's mind works with the provocative image, unconscious associations are liberated, and the creative imagination asserts itself in a totally open-ended investigative process. To a greater or lesser extent, Ernst, Masson, and Miró also followed this approach, variously called organic, emblematic, or absolute Surrealism. At the other pole the viewer is confronted by a world that is completely defined and minutely depicted but that makes no rational sense: fully recognizable, realistically painted images are removed from their normal contexts and reassembled within an ambiguous, paradoxical, or shocking framework. The work aims to provoke a sympathetic response in the viewer, forcing him to acknowledge the inherent “sense” of the irrational and logically inexplicable. The most direct form of this approach was taken by Magritte in simple but powerful paintings such as that portraying a normal table setting that includes a plate holding a slice of ham, from the centre of which stares a human eye. Dalí, Roy, and Delvaux rendered similar but more complex alien worlds that resemble compelling dreamlike scenes.

A number of specific techniques were devised by the Surrealists to evoke psychic responses. Among these were frottage (rubbing with graphite over wood or other grained substances) and grattage (scraping the canvas)—both developed by Ernst to produce partial images, which were to be completed in the mind of the viewer; automatic drawing, a spontaneous, uncensored recording of chaotic images that “erupt” into the consciousness of the artist; and found objects.

With its emphasis on content and free form, Surrealism provided a major alternative to the contemporary, highly formalistic Cubist (Cubism) movement and was largely responsible for perpetuating in modern painting the traditional emphasis on content.