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.

中文翻译：

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具有恒定存储的基于示例的微结构渲染

从镜面微结构渲染闪烁的细节可以提高真实感，但以前的方法需要大量存储高分辨率高度场或法线贴图和相关的加速结构。在本文中，我们旨在动态生成理论上无限的微观结构，防止明显的平铺伪影，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，并且本质上是隐式生成微观结构。我们的方法适合广泛使用的具有多重重要性采样 (MIS) 的微平面渲染框架，用详细的本地解决方案替换常用的微平面正态分布函数 (NDF)，如磨砂玻璃分布 (GGX)，运行时性能开销很小。