(art) A surrealist art technique, devised by Wolfgang Paalen, in which impressions are made by the smoke of a candle or kerosene lamp on a piece of paper or canvas.
2013, Whitney Sherman, Playing with Sketches, The Quarto Group (Rockport Publishers), page 32,
Fumage is not a frequently used drawing technique, but when used it can produce a subtle and mysterious effect. One notable twentieth-century fumage artist was banker Hugh Parker Guiler, spouse of diarist Anaïs Nin.