For my final project, I created a new light source for lrt to model lighting due to the sun. My SkyLight model is parameterized by the latitude and longitude of the viewing location, the time zone of the location, the time of day, the day of year, and weather conditions.
project is based on the 1999 SIGGRAPH paper by A. J. Preetham,
Peter Shirley, and Brian Smits at the
The paper can be found here.
◄ This image was produced by my implementation.
- May 25th
– may 25th
◄Here is a black and white rendering of the sky scene. This is based only on the luminance value values at each pixel. The model behaves appropriately, lightening towards the horizon.
In the process of modeling a realistic sky scene, I came across quite a few unexplained phenomena. I am convinced that these results are of no fault of my own, and therefore their existence can only be explained as ‘magic.’ The following is my explanations of these peculiar results.
◄This picture appears to be a image of the sky in the distance with a road in the foreground.
◄This is a rendering prior at , prior to dawn.
◄ This image represents how the sky might look to a person on a planet with a red atmosphere, such as Mars.
◄ This image shows how the sky might look on a planet with a pink atmosphere.