Ah ok.  So if 10% of the light refracts and "goes away" it still needs to be accounted for because only 90% of the light should reflect off that surface. 

 

Pakled, don't forget anisotropic materials and the ones that have 3 behaviors.  ;)

WARK!

Thus Spoketh Winterclaw: a blog about a Winterclaw who speaks from time to time.

 

(using Poser Pro 2014 SR3, on 64 bit Win 7, poser units are inches.)