Please help me understand how the glow works in this texture

[KevKiev]

Well, nah... I hear ya, but at this point I'm comfortable enough with my conclusions that I think I'll be closing the lid on this issue (barring any revelations that might be posted). Not that I wouldn't like to nail it down even more firmly, but I have sooo much other stuff to focus on (i.e. figure out) for what I want to do with this project that I'd rather spend the time elsewhere. Cheers