Many-Light Rendering Using ReSTIR-Sampled Shadow Maps
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Date
2025
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Publisher
The Eurographics Association and John Wiley & Sons Ltd.
Abstract
We present a practical method targeting dynamic shadow maps for many light sources in real-time rendering. We compute fullresolution shadow maps for a subset of lights, which we select with spatiotemporal reservoir resampling (ReSTIR). Our selection strategy automatically regenerates shadow maps for lights with the strongest contributions to pixels in the current camera view. The remaining lights are handled using imperfect shadow maps, which provide low-resolution shadow approximation. We significantly reduce the computation and storage compared to using all full-resolution shadow maps and substantially improve shadow quality compared to handling all lights with imperfect shadow maps.
Description
CCS Concepts: Computing methodologies → Rendering
@article{10.1111:cgf.70059,
journal = {Computer Graphics Forum},
title = {{Many-Light Rendering Using ReSTIR-Sampled Shadow Maps}},
author = {Zhang, Song and Lin, Daqi and Wyman, Chris and Yuksel, Cem},
year = {2025},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.70059}
}