Efficient Spherical Harmonics Lighting with the Preetham Skylight Model
| dc.contributor.author | Habel, Ralf | en_US |
| dc.contributor.author | Mustata, Bogdan | en_US |
| dc.contributor.author | Wimmer, Michael | en_US |
| dc.contributor.editor | Katerina Mania and Eric Reinhard | en_US |
| dc.date.accessioned | 2015-07-13T09:53:26Z | |
| dc.date.available | 2015-07-13T09:53:26Z | |
| dc.date.issued | 2008 | en_US |
| dc.description.abstract | We present a fast and compact representation of a skylight model for spherical harmonics lighting, especially for outdoor scenes. This representation allows dynamically changing the sun position and weather conditions on a per frame basis. We chose the most used model in real-time graphics, the Preetham skylight model, because it can deliver both realistic colors and dynamic range and its extension into spherical harmonics can be used to realistically light a scene. We separate the parameters of the Preetham skylight model s spherical harmonics extension and perform a polynomial two-dimensional non-linear least squares fit for the principal parameters to achieve both negligible memory and computation costs. Additionally, we execute a domain specific Gibbs phenomena suppression to remove ringing artifacts. | en_US |
| dc.description.sectionheaders | Lighting | en_US |
| dc.description.seriesinformation | Eurographics 2008 - Short Papers | en_US |
| dc.identifier.doi | 10.2312/egs.20081036 | en_US |
| dc.identifier.pages | 119-122 | en_US |
| dc.identifier.uri | https://doi.org/10.2312/egs.20081036 | en_US |
| dc.publisher | The Eurographics Association | en_US |
| dc.title | Efficient Spherical Harmonics Lighting with the Preetham Skylight Model | en_US |