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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\u2010plausible microgeometry. In this paper, we contribute the first microfacet\u2010based hair scattering model. Based on a rough cylinder geometry with tilted cuticle scales, our far\u2010field model is non\u2010separable by nature, yet allows accurate importance sampling. Additional benefits include support for elliptical hair cross\u2010sections and an analytical solution for the reflected lobe using the GGX distribution. We show that our model captures glint\u2010like forward scattering features in the R lobe that have been observed before but not properly explained.<\/jats:p>","DOI":"10.1111\/cgf.14588","type":"journal-article","created":{"date-parts":[[2022,7,30]],"date-time":"2022-07-30T08:49:28Z","timestamp":1659170968000},"page":"79-91","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["A Microfacet\u2010based Hair Scattering Model"],"prefix":"10.1111","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5068-8339","authenticated-orcid":false,"given":"W.","family":"Huang","sequence":"first","affiliation":[{"name":"University of Bonn  Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8041-5665","authenticated-orcid":false,"given":"M. B.","family":"Hullin","sequence":"additional","affiliation":[{"name":"University of Bonn  Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7648-1782","authenticated-orcid":false,"given":"J.","family":"Hanika","sequence":"additional","affiliation":[{"name":"Karlsruhe Institute of Technology  Germany"}]}],"member":"311","published-online":{"date-parts":[[2022,7,30]]},"reference":[{"key":"e_1_2_8_2_2","doi-asserted-by":"crossref","unstructured":"Aliaga Carlos Castillo Carlos Gutierrez Diego et al. \u201cAn appearance model for textile fibers\u201d.Computer Graphics Forum. Vol. 36. 4. 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