A quality seen in some paintings of a glow coming from within, the illusion that there is actually a light coming out of the picture. Glossy colors are more likely to provide this luminous effect than matte colors.Examples: Georges de La Tour (French, 1593-1652), Christ with St. Joseph in the Carpenter's Shop, c. 1640, oil on canvas, 1.37 x 1.02 m, Louvre. See Baroque and Caravaggisti.Sanford Robinson Gifford (American, 1823-1880), Kauterskill Clove, 1862, oil on canvas, 48 x 39 7/8 inches (121.9 x 101.3 cm), Metropolitan Museum of Art, NY. This painting is typical of the works produced in the art movement called Luminism.