Quote - Maybe straying a little further OT but following the 'glowing nostrils' reference.......

I am sure this has been noted by other folk too.....

The prevalence, admittedly less so of late of the flourescent lit mouth.

Often I have seen renders with characters posed with open mouths that have teeth and tongue garishly illuminated like they have strip lighting in there...

What is all that about then?

Klutz :0? 

Well, hopefully this isn't overly OT since object-based AO could be useful for addressing concerns folks might have with V4's appearance.  That strategy works with glowy mouths too.