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@article{Sousa2000ObservationalMO, title={Observational Models of Graphite Pencil Materials}, author={Mario Costa Sousa and John W. Buchanan}, journal={Comput. Graph. Forum}, year={2000}, volume={19}, pages={27-49} }

- Published 2000 in Comput. Graph. Forum
DOI:10.1111/1467-8659.00386

This paper presents models for graphite pencil, drawing paper, blenders, and kneaded eraser that produce realistic looking pencil marks, textures, and tones. Our models are based on an observation of how lead pencils interact with drawing paper, and on the absorptive and dispersive properties of blenders and erasers interacting with lead material deposited… CONTINUE READING

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