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Anisotropic Hair Reflection
· This shader gives an anisotropic highlight on metal or hair;
· It supports diffuse, normal, specular and glosses shading with alpha tested transparency (R), and the values of specular shift (G) and specular mask(B) can also apply to the anisotropic highlight;
· The highlight can be shift by the offset value;
· Directional texture can define the direction of the surface, which is similar to the tangent space normal map.
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