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redeemer90

Theory behind NHHH mapping

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Hi, I tried to do specular mapping using pixel shaders 1.4 and the NHHH mapping method used in http://www.ati.com/developer/R8500PointlightShader.html This seemed to work, but with few minor problems. Before I solve these problems I would like to know the theory behind NHHH mapping. I tried to do a google but with almost nothing. Does anyone know a website/book where I can find the theory behind this method. Thanks, - Sid

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Hi,

Thanks for your help. I managed to find a write-up on the technique in Game Programming Gems 3 (a book that I have) in section 4.18 "Textures as Lookup Tables for Per-Pixel Lighting Computations."

- Sid

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