Temporal vectorized visibility for direct illumination of animated models
摘要
Direct illumination rendering is an impor-tant technique in computer graphics.Precomputed radiance transfer algorithms can provide high quality rendering results in real time,but they can only support rigid models.On the other hand,ray tracing algorithms are flexible and can gracefully handle animated models.With NVIDIA RTX and the AI denoiser,we can use ray tracing algorithms to render visually appealing results in real time.Visually appealing though,they can deviate from the actual one considerably.We propose a visibility-boundary edge oriented infinite triangle bounding volume hierarchy(BVH)traversal algorithm to dynamically generate visibility in vector form.Our algorithm utilizes the properties of visibility-boundary edges and infinite triangle BVH traversal to maximize the efficiency of the vector form visibility generation.A novel data structure,temporal vectorized visibility,is proposed,which allows visibility in vector form to be shared across time and further increases the generation efficiency.Our algorithm can efficiently render close-to-reference direct illumination results.With the similar processing time,it provides a visual quality improvement around 10 dB in terms of peak signal-to-noise ratio(PSNR)w.r.t.the ray tracing algorithm reservoir-based spatiotemporal importance resampling(ReSTIR).
Author：
Zhenni Wang
Tze Yui Ho
Yi Xiao
Chi Sing Leung
作者单位：
Department of Electrical Engineering,City University of Hong Kong,Kowloon,Hong Kong SAR,China
School of Design,Hunan University,Changsha,China
年，卷(期)：
2024, 10(6)
机标分类号：
V475.3
TN91
TP391.9
在线出版日期：
2025年4月23日
