“Gil Elvgren ( March 15, 1914 – February 29, 1980), born Gillette Elvgren, was an American painter of pin-up girls, advertising and illustration, Elvgren was one of the more important pin-up and glamour artists of the twentieth century. Today, he is best known for his pin-up paintings for Brown & Bigelow.
His technique was to photograph the model and then paint it with a slightly exaggerated hyper-realism in terms of length of legs, hair and chest. “
SOURE: http://webodysseum.com/art/pin-up-girls-by-gil-elvgren/