“Efficient Multiscale Rendering of Specular Microstructure” by Atanasov, Křivánek, Koylazov and Wilkie
Conference:
Type(s):
Entry Number: 16
Title:
- Efficient Multiscale Rendering of Specular Microstructure
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Abstract:
Texturing is a ubiquitous technique used to enrich surface appearance with fine detail. While standard filtering approaches, such as mipmapping or summed area tables, are available for rendering diffuse reflectance textures at different levels of detail, no widely accepted filtering solution exists for multiresolution rendering of surfaces with fine specular normal maps. The current state of the art offers accurate filtering solutions for specular reflection at the cost of very high memory requirements and expensive 4D queries. We propose a novel normal map filtering solution for specular surfaces which supports data pre-filtering, and with an evaluation speed that is roughly independent of the filtering footprint size. Its memory usage and evaluation speed are significantly more favorable than for existing methods. Our solution is based on high-resolution binning in the half-vector domain, which allows us to quickly build a very memory efficient data structure.
References:
Luis E. Gamboa, Jean-Philippe Guertin, and Derek Nowrouzezahrai. 2018. Scalable Appearance Filtering for Complex Lighting Effects. ACM Trans. Graph. 37, 6, Article 277 (Dec. 2018), 13 pages. https://doi.org/10.1145/3272127.3275058
Homan Igehy. 1999. Tracing Ray Differentials. In Proceedings of SIGGRAPH ’99. ACM Press/Addison-Wesley Publishing Co., New York, NY, USA, 179–186. https://doi. org/10.1145/311535.311555
Bruce Walter, Stephen R. Marschner, Hongsong Li, and Kenneth E. Torrance. 2007. Microfacet Models for Refraction Through Rough Surfaces. In Proceedings of the 18th Eurographics Conference on Rendering Techniques (Grenoble, France) (EGSR’07). Eurographics Association, Aire-la-Ville, Switzerland, 195–206. https://doi.org/10. 2312/EGWR/EGSR07/195-206
Ling-Qi Yan, Miloš Hašan, Steve Marschner, and Ravi Ramamoorthi. 2016. Position- Normal Distributions for Efficient Rendering of Specular Microstructure. ACM Transactions on Graphics (Proceedings of SIGGRAPH 2016) 35, 4 (2016).
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Acknowledgements:
We are grateful to Veselin Mihaylov for preparing the scenes and to Lingqi Yan for providing us with his code.
