When drawing in black and white, an artist must consider the lightness or darkness, called local value, of each object. Local value will vary between objects and be darker in shadows and highlights. Chiaroscuro refers to the use of light and dark values to create the illusion of three-dimensional form and show drama through contrast. For class, students will draw a still life by first blackening the page with charcoal and then using an eraser to pick out highlights and mid-tones, observing local value and avoiding outlining.