1. Akenine-Moeller Tomas Haines Eric andHoffman Naty. “Real-Time Rendering”. (2018) 1.
2. Arvo James. “Applications of Irradiance Tensors to the Simulation of non-Lambertian Phenomena”.Proc. of the 22nd Annual Conference on Computer Graphics and Interactive Techniques. SIGGRAPH '95.1995 335–342. doi:10.1145/218380.2184674.
3. Biri Venceslas Arquès Didier andMichelin Sylvain. “Real time rendering of atmospheric scattering and volumetric shadows”.Journal of International Conference on Computer Graphics Visualization and Computer Vision (WSCG)14.1 (2006) 65–722 3.
4. Beyond points and beams
5. Billeter Markus Sintorn Erik andAssarsson Ulf. “Real Time Volumetric Shadows Using Polygonal Light Volumes”.Proc. of the Conference on High Performance Graphics.2010 39–45. doi:10.2312/EGGH/HPG10/039-0452 3.