I was thinking along the same lines. Although I had a ghosting effect or washing out type effect stuck in my mind. Which lent me to lean more towards a white rather than a black, but I am still learning the nodes so to speak and could have this mixed up. Basically I will plug anything into anything just to see what happens lol. More so as well it only works in eevee and not the principled shader as to me they are based around the same type of setup just using a different engine.

Incantrix