If you have taken any painting or drawing class you know how important light and shadow can be in your artwork. But if you haven't taken any classes don't worry, many who take classes still can't figure out shading. It's that complicated.
Never fear, though. We are going to break it down in the next few exercises.
Okay, first you need to see how light effects objects. Take any lamp and set it on a table. Next, find some objects with simple shapes like a ball, toy blocks, a drinking glass, or a soda can. Tilt the lamp's shade so that it casts a ray of light across your objects.