The difference between painting a circle and a sphere is the use of shading. By having a series of values (or tones) from light to dark, as shown here, what you paint looks like a sphere or ball. The values are shown here as distinct bands simply to make it clear; when you paint them blend the edges of the values into one another so there are no sharp transitions between them.
This sphere art worksheet has the light coming from the traditional Western realist angle -- 45 degrees from the left above you. You may find it easier to visualise as the light coming over your left shoulder. This creates a shadow on the right-hand side of an object. A sphere is the basic shape of many things, for instance an apple, orange, or tennis ball. Being able to paint a realistic basic sphere is the first step in painting these realistically.
Print this worksheet for reference, then print the outline sphere art worksheet which has a grid for painting a value scale and guidelines on the sphere for painting in the values to create a sphere.
