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Misc Real-Time Stroke Textures

Author(s): Bert Freudenberg.
Misc: Technical Sketch presented at SIGGRAPH 2001, 2001.
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Shading in line drawings is expressed by varying the stroke width or density of strokes covering an object's surface. In their pioneering work, Winkenbach and Salesin introduced the concept of "prioritized stroke textures" to the emerging field of non-photorealistic rendering1. Despite the advances in processing power in the years since then, the sheer number of lines to draw prevents this method from running in real-time. A real-time approach for hatching was presented by Lake et al.2, which chooses from a set of textures based on the brightness at vertices, subdividing polygons if necessary. However, the method is very CPU-heavy and requires many polygons.

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