Source Engine Global Lighting (Day/Night)

Sam Za Nemesis has developed a Cascaded Shadow Map technique for use in the Alien Swarm engine, this technique is used in many mainstream games, Like Crysis, Call of Duty, Assassins Creed and so on, The shadow code is mostly based with what Valve left the modders with. I created the GUI which allows mappers to preview their lighting settings on the fly. Mappers need only tweak their indoor lights and basic ambience.