Arrange a still life of at least one light object, one dark and one medium valued object. Make a drawing on 18 x 24 in. drawing paper with graphite pencils addressing the local values of the arrangement. In other words, draw the values that you see within the still life. In addition, illustrate the categories of light.
The drawing above has masterfully captured the local values as well as the categories of light and reflective surfaces with additive and reductive drawing techniques.