Glint Rendering based on a Multiple-Scattering Patch BRDF
| dc.contributor.author | Chermain, Xavier | en_US |
| dc.contributor.author | Claux, Frédéric | en_US |
| dc.contributor.author | Mérillou, Stéphane | en_US |
| dc.contributor.editor | Boubekeur, Tamy and Sen, Pradeep | en_US |
| dc.date.accessioned | 2019-07-14T19:24:09Z | |
| dc.date.available | 2019-07-14T19:24:09Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Rendering materials such as metallic paints, scratched metals and rough plastics requires glint integrators that can capture all micro-specular highlights falling into a pixel footprint, faithfully replicating surface appearance. Specular normal maps can be used to represent a wide range of arbitrary micro-structures. The use of normal maps comes with important drawbacks though: the appearance is dark overall due to back-facing normals and importance sampling is suboptimal, especially when the micro-surface is very rough. We propose a new glint integrator relying on a multiple-scattering patch-based BRDF addressing these issues. To do so, our method uses a modified version of microfacet-based normal mapping [SHHD17] designed for glint rendering, leveraging symmetric microfacets. To model multiple-scattering, we re-introduce the lost energy caused by a perfectly specular, single-scattering formulation instead of using expensive random walks. This reflectance model is the basis of our patch-based BRDF, enabling robust sampling and artifact-free rendering with a natural appearance. Additional calculation costs amount to about 40% in the worst cases compared to previous methods [YHMR16,CCM18]. | en_US |
| dc.description.number | 4 | |
| dc.description.sectionheaders | Materials and Reflectance | |
| dc.description.seriesinformation | Computer Graphics Forum | |
| dc.description.volume | 38 | |
| dc.identifier.doi | 10.1111/cgf.13767 | |
| dc.identifier.issn | 1467-8659 | |
| dc.identifier.pages | 27-37 | |
| dc.identifier.uri | https://doi.org/10.1111/cgf.13767 | |
| dc.identifier.uri | https://diglib.eg.org:443/handle/10.1111/cgf13767 | |
| dc.publisher | The Eurographics Association and John Wiley & Sons Ltd. | en_US |
| dc.subject | Computing methodologies | |
| dc.subject | Rendering | |
| dc.subject | Reflectance modeling | |
| dc.title | Glint Rendering based on a Multiple-Scattering Patch BRDF | en_US |