I think the black is just the gloom, maybe the author wants to portray that he's facial structure is much worse that one cannot portray it so they just leave it with shadow(I can't except the truth of author's rascism)
I think it's supposed to be burn scars, and the artist doesn't know how to draw them.
Yeahh i couldn't put it into words but ivwas thinking the same
I think the black is just the gloom, maybe the author wants to portray that he's facial structure is much worse that one cannot portray it so they just leave it with shadow(I can't except the truth of author's rascism)