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Spectral Mollification for Bidirectional Fluorescence
- Source :
- Computer Graphics Forum. 39:373-384
- Publication Year :
- 2020
- Publisher :
- Wiley, 2020.
-
Abstract
- Fluorescent 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.
- Subjects :
- Physics
Artificial materials
business.industry
020207 software engineering
02 engineering and technology
Computer Graphics and Computer-Aided Design
Fluorescence
Rendering (computer graphics)
Wavelength
Optics
Bidirectional scattering distribution function
0202 electrical engineering, electronic engineering, information engineering
Fluorescent materials
020201 artificial intelligence & image processing
Ray tracing (graphics)
Transport phenomena
business
Subjects
Details
- ISSN :
- 14678659 and 01677055
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Computer Graphics Forum
- Accession number :
- edsair.doi...........6bd304ab4061b44ba061c5657711ea68
- Full Text :
- https://doi.org/10.1111/cgf.13937