That is looking really, really good.  I think you ought to consider marketing that, because it kicks all kinds of butt.  Getting reasonably good eye materials is a chore, people always tend to leave in goofy reflections baked into the texture and this is EXTREMELY flexible and cool.  Really excellent achievement, I expect people will be ripping this off for years to come.

To me the big benefit is not so much speed, but flexibility - from what I can see, this technique can be tweaked pretty easily and quickly to come up with a very large variety of eye textures that will react to light the way they should, instead of having to painstakingly paint out flaws or add in variations with a paint program.

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