Chiaroscuro is an oil painting technique, developed during the Renaissance, that uses strong tonal contrasts between light and dark to model three-dimensional forms, often to dramatic effect. The underlying principle is that solidity of form is best achieved by the light falling against it. Artists known for developing the technique include Leonardo da Vinci, Caravaggio, and Rembrandt. It is a mainstay of black and white and low-key photography. The chiaroscuro, on a two-dimensional image, like a wall, a panel, a canvas, a photographic print on paper, gives the illusion of the relief, volumes by imitating the effects that light produces on these volumes in space real. The modeling, this representation of volumes, can be done by other means than by the chiaroscuro, as was the case in the Middle Ages. With the chiaroscuro, the more or less enlightened parts are clear or in the shade. Depending on the illuminated, smooth,…