I have been wondering how accurate the angle dependent reflection
patch is. Since I live near a lake, I went there to look for answers.
I came away confused. I couldn't see *any* difference in amount or
quality of the water's reflections based upon viewing angle. What is
the supposed physical property that this patch is trying to simulate?
Is it based in physics at all, or is it just an estheticly pleasing
modification of the image? 

Does anyone know the answers?

Later,
Glen

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