Adaptive Dynamic Global Illumination

(In High Performance Graphics '22 Poster)

Our technique demonstrated on a modified BISTRO EXTERIOR scene containing 192 x 64 x 192 probes. The third row shows the changes inside the tunnel as the gate opens over time. Our techniques responds faster to a dynamic stimuli and offers 1.7-times higher performance compared to the Q-DDGI implementation even with large probe grid containing excess of 2.3 million probes. Q-DDGI, detailed in section 5, is an extension of vanilla DDGI making it more competitive and comparable against our approach.

Abstract

We present an adaptive extension of probe based global illumination solution that enhances the response to dynamic changes in the scene while while also enabling an order of magnitude increase in probe count. Our adaptive sampling strategy carefully places samples in regions where we detect time varying changes in radiosity either due to a change in lighting, geometry or both. Even with large number of probes, our technique robustly updates the irradiance and visibility cache to reflect the most up to date changes without stalling the overall algorithm. Our bandwidth aware approach is largely an improvement over the original Dynamic Diffuse Global Illumination while also remaining orthogonal to the recent advancements in the technique.

Comparision

Moving Buddha over glossy surface under ambient lighting. The reflections on the glossy floor from the moving object is missing in Q-DDGI.

Video results

Downloads

Paper: adgi.pdf (2.7MB)
HPG Poster: adgi_poster.pdf (1MB)
Video: gDrive (MP4, 586MB)
Bibtex: adgi.bib

Acknowledgements

We thank Jing Huang for her valuable feedback and helping us with the literature review. We also thank the reviewers for their constructive feedback, the ORCA for the Amazon Lumberyard Bistro model, the Stanford CG Lab for the Buddha model, and Morgan McGuire for the Crytek Sponza models. This work was supported by Huawei Vancouver CG labs and a Ph.D. scholarship from the Fonds de recherche du Québec – nature et technologies.