Anisotropic

Author: Aras Pranckevicius, inspired by Patrik/Metervara and NVIDIA.

Description
A classic anisotropic lighting shader using a lookup texture. Pretty much straight from NVIDIA example.

It is a pixel-lit shader that requires vertex&fragment programs. Otherwise it falls back to VertexLit.

Usage

 * Get the anisotropic lookup texture from NVIDIA code sample (in Media/Textures/2d/Aniso2.tga).
 * Setup it's wrap mode to Clamp in Unity's texture inspector.
 * Create a material with this shader, assign the anisotropic lookup texture to anisotropic property.
 * Setup your main texture & color in the material.