I thought about that, and then I asked myself does mearly hitting the metal do something to refract light (at least enough to warrent attention).  In order to reflect the light has to touch the metal.  So does that touch count as a transition?

EDIT: Also I've been google searching and if you do something like aluminum refection or steel refraction, you'll get some sites giving you numbers.  That's really when my curiosity peaked on this question in general.

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.)