Geometry of fibers with varying topology

• Anisotropic shading techniques can be used for materials like hair and silk. Such materials have a surface consisting of very small fibers having a main direction. Geometrically each fiber can be viewed as a cylinder. Poulin and Fournier proposed an illumination model for such materials using a flat topology only. In the paper a model using a varying topology is described. The varying topology is a more correct model and visible differences are clearly apparent.

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