Transparencies in design are often used to create subtle shadings of meaning that modify a "core" idea. The core idea is required to understand the transparencies, but the shadings alone are not enough to understand the element. The transparencies can variously occlude, magnify, minify, extend, patch, nullify and replace the elements of the core to which they correspond. Gels can be used to colour and shade transparencies the core idea with implications.
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Document Name: tc.genorg.org.stack.optics.htm
Copyright (c) 1997 -- Mike Fletcher
Reproduction for other than personal use prohibited without express written permission from the author.