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        sketch - A 3D Scene Description Translator.
        
        
        - Description:
- Sketch is a small, simple system for producing line drawings of two- or
three-dimensional solid objects and scenes. It began as a way to make
illustrations for a textbook after we could find no suitable tool for this
purpose. Existing scene processors emphasized GUIs and/or photo-realism,
both un-useful to us. We wanted to produce finely wrought, mathematically-based
illustrations with no extraneous detail. The input language is reminiscent of
PSTricks, so will be easy to learn for current PSTricks users. 
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