ParallaxTest

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ParallaxTest is an unfinished shader since <Alien Swarm> (although not available in SDK 2013) which draws parallax mapping on an albedo. Alternative to the disabled $parallaxmap shader parameter. Accepts only a $basetexture, of which the alpha channel is used as the heightmap.

Bug: The material will always be drawn unlit.

To do: Document/test more of this shader!