Example-Based Microstructure Rendering with Constant Storage

Example-Based Microstructure Rendering with Constant Storage
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具有恒定存储的基于示例的微观结构渲染

DOI:
10.1145/3406836
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发表时间:
2020-08
期刊:
ACM Transactions on Graphics (CCF A类期刊)
影响因子:
--
通讯作者:
Ling-Qi Yan
Ling-Qi Yan
中科院分区:
其他
文献类型:
--
作者:
Beibei Wang;Milos Hasan;Nicolas Holzschuch;Ling-Qi Yan

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从镜面微观结构渲染闪光细节提高了真实感水平,但以前的方法需要大量存储高分辨率高度场或法线贴图以及相关的加速结构。在本文中,我们的目标是动态生成理论上无限的微观结构,防止明显的平铺伪像,同时实现恒定的存储成本。与传统的纹理合成不同,我们的方法支持任意点和范围查询,本质上是隐式生成的微观结构。我们的方法适合广泛使用的microfacet渲染框架与多重要性采样(MIS),取代常用的microfacet正常分布函数(NDF),如磨玻璃分布(GGX)的详细的本地解决方案,与少量的运行时性能开销。
Rendering glinty details from specular microstructure enhances the level of realism, but previous methods require heavy storage for the high-resolution height field or normal map and associated acceleration structures. In this article, we aim at dynamically generating theoretically infinite microstructure, preventing obvious tiling artifacts, while achieving constant storage cost. Unlike traditional texture synthesis, our method supports arbitrary point and range queries, and is essentially generating the microstructure implicitly. Our method fits the widely used microfacet rendering framework with multiple importance sampling (MIS), replacing the commonly used microfacet normal distribution functions (NDFs) like ground glass distribution (GGX) by a detailed local solution, with a small amount of runtime performance overhead.
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