Hair Shader

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I referenced Kajiya-Kay and Marschner method for anisotropic hair shader.

It can control each of colors, width, gap in primary and secondary highlights.

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To represent fine hair, one of the most frequently used method is using opacity in translucent blend mode. But, translucent shader have had sorting problem. To solve this problem, I used dithering at UE3 which is used in UE4.

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<Opacity with degree of dithering>

 

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