In this chapter, you will learn how to shade three-dimensional objects. Shading produces a much more realistic look and enhances the perception of three-dimensionality. The general idea is to first establish the direction of light rays impacting the object being illuminated and then determine the shading effect the light has on the object’s surface. In the case of a box, which I will discuss next, six flat planes comprise the surface of the box. The orientation of these planes relative to the direction of the light will determine the degree of shading on each plane. To simulate shading, the planes can be filled ...
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