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A Microfacet‐based Hair Scattering Model

Huang, W.; Hullin, M. B.; Hanika, J. 1
1 Institut für Visualisierung und Datenanalyse (IVD), Karlsruher Institut für Technologie (KIT)

Abstract:

The development of scattering models and rendering algorithms for human hair remains an important area of research in computer graphics. Virtually all available models for scattering off hair or fur fibers are based on separable lobes, which bring practical advantages in importance sampling, but do not represent physically-plausible microgeometry. In this paper, we contribute the first microfacet-based hair scattering model. Based on a rough cylinder geometry with tilted cuticle scales, our far-field model is non-separable by nature, yet allows accurate importance sampling. Additional benefits include support for elliptical hair cross-sections and an analytical solution for the reflected lobe using the GGX distribution. We show that our model captures glint-like forward scattering features in the R lobe that have been observed before but not properly explained.


Verlagsausgabe §
DOI: 10.5445/IR/1000150034
Veröffentlicht am 25.08.2022
Originalveröffentlichung
DOI: 10.1111/cgf.14588
Scopus
Zitationen: 3
Web of Science
Zitationen: 2
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Visualisierung und Datenanalyse (IVD)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 07.2022
Sprache Englisch
Identifikator ISSN: 0167-7055, 1467-8659
KITopen-ID: 1000150034
Erschienen in Computer Graphics Forum
Verlag John Wiley and Sons
Band 41
Heft 4
Seiten 79–91
Vorab online veröffentlicht am 30.07.2022
Nachgewiesen in Web of Science
Dimensions
Scopus
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