The impact was greatest on revolutionary posters, lithography and multiples, dramatic and documentary film, realistic painting, grand architecture, and least in areas of domestic pottery, ceramics, exportable needlework, and the visual crafts. Sports art and politically charged revolutionary posters have been the most sophisticated and internationally collectible by auction houses and specialty collectors. North Korean painters who escaped to the United States in the late 1950s include the Fwhang sisters. Duk Soon Fwhang and Chung Soon Fwhang O'Dwyer avoid overtly political statements in favor of tempestuous landscapes, bridging Western and Far Eastern painting techniques. North Korean painters are renowned for their skill, and those who manage to defect to South Korea are regularly employed as artists there.