145695 20260217205533.0 doi 10.1111/cgf.15235 sideral 140658 ART-2024-140658 eng Padrón-Griffe, Juan Raúl Universidad de Zaragoza (orcid)0000-0002-6164-2838 A Surface-based Appearance Model for Pennaceous Feathers 2024 Access copy available to the general public Unrestricted The appearance of a real‐world feather results from the complex interaction of light with its multi‐scale biological structure, including the central shaft, branching barbs, and interlocking barbules on those barbs. In this work, we propose a practical surface‐based appearance model for feathers. We represent the far‐field appearance of feathers using a BSDF that implicitly represents the light scattering from the main biological structures of a feather, such as the shaft, barb and barbules. Our model accounts for the particular characteristics of feather barbs such as the non‐cylindrical cross‐sections and the scattering media via a numerically‐based BCSDF. To model the relative visibility between barbs and barbules, we derive a masking term for the differential projected areas of the different components of the feather's microgeometry, which allows us to analytically compute the masking between barbs and barbules. As opposed to previous works, our model uses a lightweight representation of the geometry based on a 2D texture, and does not require explicitly representing the barbs as curves. We show the flexibility and potential of our appearance model approach to represent the most important visual features of several pennaceous feathers. info:eu-repo/grantAgreement/EC/H2020/956585/EU/Predictive Rendering In Manufacture and Engineering/PRIME This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 956585-PRIME info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es 2.9 2024 COMPUTER SCIENCE, SOFTWARE ENGINEERING 49 / 129 = 0.38 2024 Q2 T2 0.788 2024 Computer Graphics and Computer-Aided Design 2024 Q1 Computer Networks and Communications 2024 Q2 6.0 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Lanza, Dario Universidad de Zaragoza (orcid)0000-0001-7183-8159 Jarabo, Adrián (orcid)0000-0001-9000-0466 Muñoz, Adolfo Universidad de Zaragoza (orcid)0000-0002-8160-7159 5007 570 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Lenguajes y Sistemas Inf. 43, 7 (2024), e15235 [13 pp.] Comput. graph. forum Computer Graphics Forum 0167-7055 768190 http://zaguan.unizar.es/record/145695/files/texto_completo.pdf Versión publicada 2278075 http://zaguan.unizar.es/record/145695/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:145695 articulos driver 2026-02-17-20:33:08 ARTICLE