A Critical Review of the Preetham Skylight Model
Date issued
2007
Journal Title
Journal ISSN
Volume Title
Publisher
Václav Skala - UNION Agency
Abstract
The Preetham skylight model is currently one of the most widely used analytic models of skylight luminance
in computer graphics. Despite its widespread use, very little work has been carried out to verify
the results generated by the model, both in terms of the luminance patterns it generates, and in terms of
numerical reliability and stability.
In this paper, we show where the model exhibits problematic behaviour, and compare the computed luminance
values with the CIE 2003 Standard General Sky, and our own measurements of real, cloudless skies.
Description
Subject(s)
model osvětlení oblohy, verifikace
Citation
WSCG '2007: Short Communications Proceedings: The 15th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2007 in co-operation with EUROGRAPHICS: University of West Bohemia, Plzen, Czech Republic, January 29 – February 1, 2007, p. 23-30.