Simulating the appearance ofwoven fabrics is challenging due to the complexinterplay of lighting between the constituent yarns and fibers. Conventionalsurface-based models lack the fidelity and details for producing realisticclose-up renderings. Micro-appearance models, on the other hand, can producehighly detailed renderings by depicting fabrics fiber-by-fiber, but becomeexpensive when handling large pieces of clothing. Further, neithersurface-based nor micro-appearance model has not been shown in practiceto match measurements of complex anisotropic reflection and transmissionsimultaneously.In this paper, we introduce a practical appearance model for woven fabrics.We model the structure of a fabric at the ply level and simulate the localappearance of fibers making up each ply. Our model accounts for bothreflection and transmission of light and is capable of matching physicalmeasurements better than prior methods including fiber based techniques.Compared to existing micro-appearance models, our model is light-weightand scales to large pieces of clothing.
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