Precomputing speeds up cloth imaging

(Phys.org) —Creating a computer graphic model of a uniform material like woven cloth or finished wood can be done by modeling a small volume, like one yarn crossing, and repeating it over and over, perhaps with minor modifications for color or brightness. But the final "rendering" step, where the computer creates an image of the model, can require far too much calculating for practical use. Cornell graphics researchers have extended the idea of repetition to make the calculation much simpler and faster.

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