I have tried this in Firestorm &, Alchemy for Mac. If I have my graphics set above Mid, my eyebrows on my Lelutka head are not shown. If I change the Alpha more from Blend to Mask, then the top lashes are shown as a distorted mass of black lines (like badly applied mascara). As this happens on at least 2 viewers with PBR enabled, I assume its a LL PBR issue.