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Some excellent reference works already exist on both of these topics, a few of which are mentioned in the bibliography at the end of this book. Not only are there a variety of books that cover digital painting, modeling, animation, and
rendering from a generalized perspective, but there are also specific "how-to" guides for many of the more common software packages.
The third source of imagery-scanned/digitized "live-action" footage-is still probably the most common source with which we deal in digital compositing. There are a myriad of different formats that this source imagery can come from, some of them discussed in greater detail in Chapter 10 and Appendix D.
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