Thank you for your explanation.
I was able to understand the how this work.

Thanks for quick response.
You are right if it is transparent object.
But the problem occurs to translucent object. It has normal.
It is strange that the opaque hair does not occur, it occurs in the translucent hair.

Hi, I love ENB and IBL effect. :) Originally, hair alpha does not apply IBL. But only alpha with overlapping hair apply IBL. It is noisy artifact. http://blog-imgs-114.fc2.com/s/k/y/skyrimshot/iblalpha.jpg It stand out when AdditiveAmount and MulticativeAmount is high value. Refractive amount is not...

Great job and work fine! I introduced that in my blog for spread of LUT