Spectral Mollification for Bidirectional Fluorescence

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dc.contributor.authorJung, Alisaen_US
dc.contributor.authorHanika, Johannesen_US
dc.contributor.authorDachsbacher, Carstenen_US
dc.contributor.editorPanozzo, Daniele and Assarsson, Ulfen_US
dc.date.accessioned2020-05-24T12:52:38Z
dc.date.available2020-05-24T12:52:38Z
dc.date.issued2020
dc.description.abstractFluorescent materials can shift energy between wavelengths, thereby creating bright and saturated colors both in natural and artificial materials. However, rendering fluorescence for continuous wavelengths or combined with wavelength dependent path configurations so far has only been feasible using spectral unidirectional methods. We present a regularization-based approach for supporting fluorescence in a spectral bidirectional path tracer. Our algorithm samples camera and light sub-paths with independent wavelengths, and when connecting them mollifies the BSDF at one of the connecting vertices such that it reradiates light across multiple wavelengths. We discuss arising issues such as color bias in early iterations, consistency of the method and MIS weights in the presence of spectral mollification. We demonstrate our method in scenes combining fluorescence and transport phenomena that are difficult to render with unidirectional or spectrally discrete methods.en_US
dc.description.number2
dc.description.sectionheadersRay Tracing and Global Illumination
dc.description.seriesinformationComputer Graphics Forum
dc.description.volume39
dc.identifier.doi10.1111/cgf.13937
dc.identifier.issn1467-8659
dc.identifier.pages373-384
dc.identifier.urihttps://doi.org/10.1111/cgf.13937
dc.identifier.urihttps://diglib.eg.org:443/handle/10.1111/cgf13937
dc.publisherThe Eurographics Association and John Wiley & Sons Ltd.en_US
dc.rightsAttribution 4.0 International License
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectComputing methodologies
dc.subjectRay tracing
dc.subjectReflectance modeling
dc.titleSpectral Mollification for Bidirectional Fluorescenceen_US
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