Getting to know light and form. Follow these three rules in creating areas of form to bring life and depth to your work. 1. The Shadow Side The side of an object that is not directly lit. The dark side, or shadow side is made up of a graduated form shadow which reveals the shape and form of the object. 2. The Light Side Where light illuminates the surface of the object. Where the light directly hits, the object is given form by the use of highlights, these are the lightest part of the object. 3.