Simple Vop Set-Up for using Zbrush Normal Maps

This file contains two simple materials which make use of Normal Maps generated in Z Brush and show how they can be applied to affect the lighting in your own materials.

version 2: Is identical the the previous version, however /shop/tangent_space_normals/normal_mapping/yaxis has had the commenting corrected to express the connection to the V derivative instead of the U derivative The VOPs have been commented, so be sure to Middle Mouse Button on them if you're confused!