Importance Sampling of Many Lights on the GPU

Pierre Moreau, Petrik Clarberg

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review


The introduction of standardized APIs for ray tracing, together with hardware acceleration, opens up possibilities for physically based lighting in real-time rendering. Light importance sampling is one of the fundamental operations in light transport simulations, applicable to both direct and indirect illumination. This chapter describes a bounding volume hierarchy data structure and associated sampling methods to accelerate importance sampling of local light sources. The work is based on recently published methods for light sampling in production rendering, but it is evaluated in a real-time implementation using Microsoft DirectX Raytracing.
Original languageEnglish
Title of host publicationRay Tracing Gems
EditorsEric Haines, Tomas Akenine-Möller
Number of pages283
ISBN (Electronic)978-1-4842-4427-2
ISBN (Print)978-1-4842-4426-5
Publication statusPublished - 2019 Mar 18

Subject classification (UKÄ)

  • Computer Science


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