The Light Volume: an aid to rendering complex environments

Chiu, Ken; Zimmerman, Kurt; Shirley, Peter

doi:10.1007/978-3-7091-7484-5_1

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…Irradiance caching was first introduced by Ward et al [WRC88, WH92] and subsequently improved in [SM02, TL04, CB04]. Extensions to radiance were proposed including stepwise representations, such as fixed‐size data structures [CZS96, GSHG98] and Haar wavelets [CSSD96], as well as (hemi)spherical harmonics [AFO05, KG05, KBPZ06]. Voxel‐based [BSS93] and envelope‐based methods [BSS94] were also introduced for volumetric media.…”

Section: Related Workmentioning

confidence: 99%

Sequential Monte Carlo Adaptation in Low‐Anisotropy Participating Media

Pegoraro

Wald

Parker

2008

Computer Graphics Forum

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This paper presents a novel method that effectively combines both control variates and importance sampling in a sequential Monte Carlo context. The radiance estimates computed during the rendering process are cached in a 5D adaptive hierarchical structure that defines dynamic predicate functions for both variance reduction techniques and guarantees well-behaved PDFs, yielding continually increasing efficiencies thanks to a marginal computational overhead. While remaining unbiased, the technique is effective within a single pass as both estimation and caching are done online, exploiting the coherency in illumination while being independent of the actual scene representation. The method is relatively easy to implement and to tune via a single parameter, and we demonstrate its practical benefits with important gains in convergence rate and competitive results with state of the art techniques.

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Section: Related Workmentioning

confidence: 99%

Sequential Monte Carlo Adaptation in Low‐Anisotropy Participating Media

Pegoraro

Wald

Parker

2008

Computer Graphics Forum

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“…DeŞne the set DLMP ťpoints of DLM belonging to D P . 6. Calculate values for all points of DLMP with the unknown value using formula 1.…”

Section: Gather Light Energy From the End Of The Pathmentioning

confidence: 99%

Light Meshes—Original Approach to Produce Soft Shadows in Ray Tracing

Debelov

Sevastyanov

2002

Lecture Notes in Computer Science

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Abstract. The given paper is devoted to the application of the original approach of Light Meshes to the recursiveraytracing algorithm. It is a sort of a simulation of a solution for the global illumination problem. It consumes not so much extra computational time and, nevertheless, allows: a to speedup a process of shadow calculations, b to build soft shadows, c to simulate main eŞects of diŞuse interreŞections, d to omit the ambient term. In order to obtain the goals listed abovewe introduce the notion of space light meshes. A light mesh is a pointset mesh points in 3D space of a scene. Ateachmesh pointwecompute illuminance, whichc haracterizes some kind of "lightŞeldin tensity" in the scene. Then important part of resulting illumination of a scene object point object point is obtained via interpolation of stored values of nearby mesh points. Our experiments show that the suggested approach reduces computational time with respect to ray tracing algorithm if a scene contains a lot of light sources andŠor an image has a large resolution.

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“…This idea is exploited in different forms by several approaches, like the photon mapping [Jen96], the light volume [CZS96], the irradiance cache [WRC88], the irradiance volume [GSHG98], or the light field [LH96]. From these algorithms only the photon map stores independent illumination samples.…”

Section: Introductionmentioning

confidence: 99%

Ray maps for global illumination

Havran

Bittner²,

Seidel

2004

ACM SIGGRAPH 2004 Sketches on - SIGGRAPH '04

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This is an electronic version of an article published in Eurographics Symposium on Rendering 2005, pages 43-54,311. The article cannot be used for commercial sale. Copyright c by the Eurographics Association. The electronic version of the proceedings is available from the Eurographics Digital Library at http://diglib.eg.org.For any further questions on copyright or technical content, contact the first author (Vlastimil Havran) by email(search for "Vlastimil Havran" on WWW to get an email address.)

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The Light Volume: an aid to rendering complex environments

Cited by 5 publications

References 14 publications

Sequential Monte Carlo Adaptation in Low‐Anisotropy Participating Media

Sequential Monte Carlo Adaptation in Low‐Anisotropy Participating Media

Light Meshes—Original Approach to Produce Soft Shadows in Ray Tracing

Ray maps for global illumination

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