VRVis Forum | #155

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VRVis, Ares Tower, 5.Stock, Donau-City-Straße 11, 1220 Wien

Invited Talk "Fluorescence, and what it means for rendering and appearance modelling" by Alexander Wilkie of Charles University Prague

Speaker

Alexander Wilkie, associate professor, Computer Graphics Group of the Faculty of Math and Physics, Charles University, Prague, Czech Republic

Title

Fluorescence, and what it means for rendering and appearance modelling

Abstract

The talk will have two parts: in the first, we first discuss the nature of the phenomenon, and how common it is in everyday scenes. We then go on to present recent research about fluorescence rendering which we published at the Eurographics Symposium on Rendering in June 2018. This research enables one to support fluorescence in a uni-directional path tracer which uses Hero wavelength sampling: both normal surface interactions and volumetric effects are supported in our reference implementation, which is supplied as Open Source research software.
In the second part of the talk, we will also discuss how fluorescence ties in with the synthesis of plausible reflectance spectra. In a spectral renderer, one has to internally use physically meaningful representations of light and reflectance: but for rendering assets, artists usually supply colour input data. Conversion of RGB textures to spectra is an intrinsically somewhat thorny problem, and the second part of the talk aims at communicating what is actually possible in this regard, and what not. The results shown here are the content of our upcoming EGSR 2019 paper on fluorescence-enabled spectral uplifting.