Unreal Engine 3 is a complete game development framework for next-generation consoles and DirectX9-equipped PCs, providing the vast array of core technologies, content creation tools, and support infrastructure required by top game developers.
UDK brings you Gemini, the multi-threaded rendering system. Gemini creates a lush visual reality and provides the power necessary for photorealistic simulations. Deliver stunning results with this flexible and highly optimized renderer. UDK features a 64-bit color HDR rendering pipeline. The gamma-correct, linear color space renderer provides for immaculate color precision while supporting a wide range of post-processing effects such as motion blur, depth of field, bloom, ambient occlusion and artist-defined materials.
64 bits, 64 bits omg i am so downloading this.