I don't know what else to say about this. There just isn't. They say human beings are great at finding patterns in noise, and I think that's basically why mask painters tend to paint a little ghost chevron into the forehead of their Roy masks, even though it makes zero sense to do so. All you're seeing on the left side is brown weathering applied around the eye with a sea sponge. The pattern appears to come to a rather irregular point in the way the old part 4 chevron used to, but its just a coincidence. There is no chevron, or hint of a chevron on the forehead.
Its really just paint.
