The History of Alpha Channels

January 6, 2012, 10:04 AM

http://blogs.creativecow.net/blog/11038/the-histor...

Alpha channels grew out of work done at the New York Institute of Technology in 1977. The goal was to embed transparency data directly into each file to cut down on rendering. The name alpha was chosen because it’s the part of a mathematical equation that represents blend-ing between composited images.

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