Thanks all : )
@Cuby: It’s supposed to be a tattoo in the form of a tear, just something to break the genericness and really show that the face isn’t mirrored (as the rest is).
@Framedworld: I used Photoshop. Never got around to trying Gimp, maybe it’s worth a try.
@san_diego_james: As far as I understood, triangles don’t matter unless you subsurf or animate, as you say. The triangles near the ears and on the nose wouldn’t animate in any way, so I don’t think that’s a problem, but the brow might be. But since games always translate everything to triangles, it’s a bit hard to imagine it being necessary. Worth looking into, in any case.
@Radscientist: I actually based it off Dawn of War’s Eldar Warlock ( http://forums.relicnews.com/images/avatars/warlock35fl.jpg ), but without looking at it first. Looking back now, it seems that one is a complete copy of the Eye of Ra indeed.
Good luck with you own head! Remember that, crazy as it sounds, a metal texture on low opacity can do wonders to make skin more believable : )