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Tuesday January 31, 2012

AMD DX11 Leo Demo

For those of you that haven't seen it yet, AMD has posted its DX11 Leo demo for anyone with the hardware to run it. The demo weighs in at 733MB but you shouldn't have any issues getting it, the link is pretty damn speedy right now. I'll have a video posted soon for those of you that want to see more than just screenshots.

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The Leo demo showcases a real-time, DirectX� 11 based lighting pipeline that is designed to allow for rendering scenes made of arbitrarily complex materials (including transparencies), multiple lighting models, and minimal restrictions on the number of lights that can be used -- all while supporting hardware MSAA and efficient memory usage. Specifically, this demo uses DirectCompute to cull and manage lights in a scene. The end result is a per-pixel or per-tile list of lights that forward-render based shaders use for lighting each pixel. This technique also allows for adding one bounce global illumination effects by spawning virtual point light sources where light strikes a surface. Finally, the lighting in this demo is physically based in that it is fully HDR and the material and reflection models take advantage of the ALU power of the AMD Radeon HD 7900 GPU to calculate physically accurate light and surface interactions (multiple BRDF equations, realistic use of index of refraction, absorption based on wavelength for metals, etc).

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