Only Lua Updo I could find is one sold here by 3Dream, it's a V4 prop hair. Did a few phonecalls and had it confirmed that this hair has a huge skullcap, it covers V4's eyebrows at the front.

What you are seeing is Iray's reaction to that skullcap, the render engine has problems when you have two mesh overlapping so close like that, the results are weird tints to render artifacts the further from "world center" the items are.