http://en.wikipedia.org/wiki/SCE_Worldwide_Studios
ICE Team
In addition, Naughty Dog is home to the ICE Team, one of Sony's World Wide Studios central technology groups. The ICE Team focuses on creating core graphics technologies for Sony's worldwide first party published titles, including low level game engine components, graphics processing pipelines, supporting tools, and graphics profiling and debugging tools. The ICE Team also supports third party developers with a suite of engine components, and a graphics analysis, profiling, and debugging tool for the RSX. Both enable developers to get better performance out of PlayStation hardwares.