Unreal Engine 3 (UE3) is the third version of Unreal Engine developed by Epic Games. Unreal Engine 3 was one of the first game engines to support multithreading. It used DirectX 9 as its baseline graphics API, simplifying its rendering code. The first games using UE3 were released at the end of 2006. It was succeeded by Unreal Engine 4.
History
Screenshots of Unreal Engine 3 were presented by July 2004, at which point the engine had already been in development for over 18 months.
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