World-Space Spatiotemporal Path Resampling for Path Tracing
| dc.contributor.author | Zhang, Hangyu | en_US |
| dc.contributor.author | Wang, Beibei | en_US |
| dc.contributor.editor | Chaine, Raphaëlle | en_US |
| dc.contributor.editor | Deng, Zhigang | en_US |
| dc.contributor.editor | Kim, Min H. | en_US |
| dc.date.accessioned | 2023-10-09T07:37:11Z | |
| dc.date.available | 2023-10-09T07:37:11Z | |
| dc.date.issued | 2023 | |
| dc.description.abstract | With the advent of hardware-accelerated ray tracing, more and more real-time rendering applications tend to render images with ray-traced global illumination (GI). However, the low sample counts at real-time framerates bring enormous challenges to existing path sampling methods. Recent work (ReSTIR GI) samples indirect illumination effectively with a dramatic bias reduction. However, as a screen-space based path resampling approach, it can only reuse the path at the first bounce and brings subtle benefits for complex scenes. To this end, we propose a world-space based spatiotemporal path resampling approach. Our approach caches more path samples into a world-space grid, which allows reusing sub-path starting from non-primary path vertices. Furthermore, we introduce a practical normal-aware hash grid construction approach, providing more efficient candidate samples for path resampling. Eventually, our method achieves improvements ranging from 16.6% to 41.9% in terms of mean squared errors (MSE) compared against the previous method with only 4.4% ~ 8.4% extra time cost. | en_US |
| dc.description.number | 7 | |
| dc.description.sectionheaders | Dynamic Scenes | |
| dc.description.seriesinformation | Computer Graphics Forum | |
| dc.description.volume | 42 | |
| dc.identifier.doi | 10.1111/cgf.14974 | |
| dc.identifier.issn | 1467-8659 | |
| dc.identifier.pages | 12 pages | |
| dc.identifier.uri | https://doi.org/10.1111/cgf.14974 | |
| dc.identifier.uri | https://diglib.eg.org:443/handle/10.1111/cgf14974 | |
| dc.publisher | The Eurographics Association and John Wiley & Sons Ltd. | en_US |
| dc.subject | CCS Concepts: Computing methodologies -> Rendering; Ray tracing | |
| dc.subject | Computing methodologies | |
| dc.subject | Rendering | |
| dc.subject | Ray tracing | |
| dc.title | World-Space Spatiotemporal Path Resampling for Path Tracing | en_US |
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