Also, there have been upgrades to the lighting engine which include HDR lighting, bounce lighting, self-shadowing, intersecting shadows and various other improvements.

Texture blending has been improved due to a new technology called 'reveal mapping' which compares tones between two textures and then blends them together. Further improvements to the audio and lighting engines have been made in this version.Ĭall of Duty: Black Ops II was developed using a further iteration of the IW engine. Improvements on the engine allow better streaming technology which allows larger regions for the game while running at a minimum of 60 frames per second. Call of Duty: Modern Warfare 3 utilizes an improved version of the IW 4.0 engine. This version of the engine also featured streaming technology, lighting enhancements, and support for 3D imaging. Call of Duty: Black Ops was not based on IW 4.0 rather, Treyarch further enhanced the version of IW 3.0 they had used in their previous game. The IW 4.0 engine featured texture streaming technology to create much higher environmental detail without sacrificing performance. IW 4.0 to IW 5.0 Ĭall of Duty: Modern Warfare 2 was released using the IW 4.0 engine, the only game to do so. Treyarch modified the engine for their James Bond title, 007: Quantum of Solace. The flamethrower featured propagating fire and it was able to burn skin and clothes realistically. Environments also featured more destructibility and could be set alight using a flamethrower. Improvements were made to the physics model and dismemberment was added. Treyarch began using an enhanced version of the IW 3.0 engine for Call of Duty: World at War. This game included features such as bullet penetration, improved AI, lighting engine upgrades, particle system enhancements and many more improvements. Development of the engine and the Call of Duty games has resulted in inclusion of advanced graphical features while maintaining an average of 60 frames per second on the consoles and PC.Ĭall of Duty 4: Modern Warfare was released using version 3.0 of the engine. The engine's name was not publicized until IGN was told at the E3 2009 by the studio that Call of Duty: Modern Warfare 2 would run on the 'IW 4.0 engine'. The engine has been distinct from the id Tech 3 engine on which it is based since Call of Duty 2 in 2005.

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