"Irradiance Caching" by Ignacio Castaño (Developer of "the Witness" at PS4)

• Irradiance Caching Part1
  • http://the-witness.net/news/2011/07/irradiance-caching-part-1/
• Irradiance Caching – Continued
  • http://www.ludicon.com/castano/blog/2014/07/irradiance-caching-continued/