A Tiny Example Based Procedural Model for Real-Time Glinty Appearance Rendering  

作　　者：You-Xin Xing Hao-Wen Tan Yan-Ning Xu Lu Wang 邢佑鑫;谭皓文;徐延宁;王璐(School of Software,Shandong University,Jinan 250101,China;NetEase(Hangzhou)Network Co.,Ltd,Hangzhou 310052,China)

机构地区：[1]School of Software,Shandong University,Jinan 250101,China [2]NetEase(Hangzhou)Network Co.,Ltd,Hangzhou 310052,China

出　　处：《Journal of Computer Science & Technology》2024年第4期771-784,共14页计算机科学技术学报（英文版）

基　　金：supported by the National Key Research and Development Program of China under Grant No.2022YFB3303203;the National Natural Science Foundation of China under Grant No.62272275.

摘　　要：The glinty details from complex microstructures significantly enhance rendering realism.However,the previous methods use high-resolution normal maps to define each micro-geometry,which requires huge memory overhead.This paper observes that many self-similarity materials have independent structural characteristics,which we define as tiny example microstructures.We propose a procedural model to represent microstructures implicitly by performing spatial transformations and spatial distribution on tiny examples.Furthermore,we precompute normal distribution functions(NDFs)by 4D Gaussians for tiny examples and store them in multi-scale NDF maps.Combined with a tiny example based NDF evaluation method,complex glinty surfaces can be rendered simply by texture sampling.The experimental results show that our tiny example based the microstructure rendering method is GPU-friendly,successfully reproducing high-frequency reflection features of different microstructures in real time with low memory and computational overhead.

关 键 词：real-time rendering reflectance modeling glinty material photorealistic rendering microstructure 

分 类 号：O17[理学—数学]