Found it myself as well, gonna post as a proof that it can be replicated
The thing is it feel like he just has a hole in his texture, because theres a little bit of neck texture where back of the neck is supposed to connect with the clothing
I noticed this almost immediately, lol. Funny though. Seems to be a prob cause Abram model doesn't have enough neck length. Cause I don't notice the whole when he doesn't look down.