For a nice overview of Disney's proprietary Hyperion renderer that implements this light bundling technique (and a whole lot more), see : http://www.fxguide.com/featured/disneys-new-production-rende...
For a nice overview of Disney's proprietary Hyperion renderer that implements this light bundling technique (and a whole lot more), see : http://www.fxguide.com/featured/disneys-new-production-rende...