Attached Link: http://www.peachpit.com/articles/article.asp?p=174370&seqNum=4&rl=1

Yes, yet because of its distance, its light becomes basically parallel. "Due to the fact that the sun is so far away from the earth, by the time the light reaches us, the rays are essentially parallel to one another (see Figure 7.10). That is why you will also hear the term parallel light when referring to directional lights. The farther away the light source, the more parallel the rays become. Directional lights do not fall off with distance; the intensity is constant everywhere in the scene." Link; http://www.peachpit.com/articles/article.asp?p=174370&seqNum=4&rl=1

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