Sequential Monte Carlo Instant Radiosity

Peter Hedman, Tero Karras, Jaakko Lehtinen

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

12 Citations (Scopus)


Instant Radiosity and its derivatives are interactive methods for efficiently estimating global (indirect) illumination. They represent the last indirect bounce of illumination before the camera as the composite radiance field emitted by a set of virtual point light sources (VPLs). In complex scenes, current algorithms suffer from a difficult combination of two issues: it remains a challenge to distribute VPLs in a manner that simultaneously gives a high-quality indirect illumination solution for each frame, and does so in a temporally coherent manner. We address both issues by building, and maintaining over time, an adaptive and temporally coherent distribution of VPLs in locations where they bring indirect light to the image. We introduce a novel heuristic sampling method that strives to only move as few of the VPLs between frames as possible. The result is, to the best of our knowledge, the first interactive global illumination algorithm that works in complex, highly-occluded scenes, suffers little from temporal flickering, supports moving cameras and light sources, and is output-sensitive in the sense that it places VPLs in locations that matter most to the final result.

Original languageEnglish
Title of host publicationProceedings - 20th ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, I3D 2016
Number of pages8
ISBN (Print)9781450340434
Publication statusPublished - 27 Feb 2016
MoE publication typeA4 Article in a conference publication
EventACM SIGGRAPH Symposium on Interactive 3D Graphics and Games - Redmond, United States
Duration: 26 Feb 201628 Feb 2016
Conference number: 20


ConferenceACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
Abbreviated titleI3D
CountryUnited States


  • Global illumination
  • Instant Radiosity

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    Hedman, P., Karras, T., & Lehtinen, J. (2016). Sequential Monte Carlo Instant Radiosity. In Proceedings - 20th ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, I3D 2016 (pp. 121-128). ACM.