Prague Sky Model (2021) — dataset-driven full-spectral sky light.

Implements the sky model by Wilkie et al. (2021) and Vévoda et al. (2022), presented in “A Fitted Radiance and Attenuation Model for Realistic Atmospheres”.

The model covers:

• Solar elevation from -4.2° to 90°
• Visibility (meteorological range) from 20 km to 131.8 km
• Observer altitude from 0 km to 15 km
• Ground albedo from 0 to 1
• Full spectrum: 280–2480 nm (ground-level dataset)

Dataset required: this model requires an external dataset file available from the Charles University Prague sky model page. The ground-level dataset is approximately 103 MB. Set the path via setDatasetPath(String).