Digital Compositing, as we are going to be discussing it, attempts primarily to deal with the process of integrating images from multiple sources into a single, seamless whole. While many of these techniques apply to still images, we will be looking at tools and methods which are useful and reasonable for large sequences of images as well. In the first half of this document, we will deal more with the Science of Digital Compositing. The second half will deal with a few of the more complex (or at least misunderstood) issues on the topic, as well as look at techniques that deal with the Art of Digital Compositing. As you will see, the skills of a good compositor range from technician to artist. Not only does one need to understand the basic 'tools of the trade', which can include a variety of software, one must also be aware of the visual nature of the process. Remember, the bottom line is that all the technical considerations are unimportant when confronted with the question of "Does it look right?" Obviously this is a subjective judgement, and a good compositor able to make these decisions will always be in high demand.