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A fitted radiance and attenuation model for realistic atmospheres

Wilkie, Alexander; V�voda, Petr; Bashford-Rogers, Thomas; Ho�ek, Luk�; Iser, Tom�; Kol�?ov�, Monika; Rittig, Tobias; K?iv�nek, Jaroslav

Authors

Alexander Wilkie

Petr V�voda

Luk� Ho�ek

Tom� Iser

Monika Kol�?ov�

Tobias Rittig

Jaroslav K?iv�nek



Abstract

We present a fitted model of sky dome radiance and attenuation for realistic terrestrial atmospheres. Using scatterer distribution data from atmospheric measurement data, our model considerably improves on the visual realism of existing analytical clear sky models, as well as of interactive methods that are based on approximating atmospheric light transport. We also provide features not found in fitted models so far: radiance patterns for post-sunset conditions, in-scattered radiance and attenuation values for finite viewing distances, an observer altitude resolved model that includes downward-looking viewing directions, as well as polarisation information. We introduce a fully spherical model for in-scattered radiance that replaces the family of hemispherical functions originally introduced by Perez et al., and which was extended for several subsequent analytical models: our model relies on reference image compression via tensor decomposition instead.

Journal Article Type Article
Conference Name SIGGRAPH
Acceptance Date Mar 29, 2021
Online Publication Date Jul 19, 2021
Publication Date 2021-08
Deposit Date Jun 9, 2021
Journal ACM Transactions on Graphics
Print ISSN 0730-0301
Electronic ISSN 1557-7368
Publisher Association for Computing Machinery (ACM)
Volume 40
Issue 4
Article Number 135
DOI https://doi.org/10.1145/3450626.3459758
Public URL https://uwe-repository.worktribe.com/output/7452612