improved non-player characters behaviors. Modern Warfare (2019 reboot) and Call of Duty: Warzone uses a heavily rebuilt IW engine for the series, allowing for the use of more detailed environments, advanced photogrammetry and rendering, better volumetric lighting, and the use of ray tracing. The new engine had been in development five years prior to the release of the game, and was a collaborative effort between the main Infinity Ward studio in California and the new studio in Poland.Call of Duty: Modern Warfare II is developed on a highly upgraded version of the engine first used in 2019's Modern Warfare''. The engine is co-developed by Infinity Ward, Treyarch, and Sledgehammer Games, and will be used in future installments of the series in a unified effort to ensure that every studio is working with the same tools. Games References External links 2002 establishments in California Activision American companies established in 2002 Companies based in Los Angeles Video game companies established in 2002 Former Vivendi subsidiaries Video game companies based in California Video game development companies 2003 mergers and acquisitions