I've done some experimenting with eyebrow trans maps. On the left is **BluEcho**'s - which I think was hand-drawn and is actually pretty darn good. On the right is one I extracted from a photo. It's also twice the resolution (4096x4096 for the whole map, of which the eyebrows are a tiny part), but I don't think that's strictly necessary.

By the way: does anyone know how Firefly stores images maps internally during rendering? I'm wondering if it would be better to map the brows separately, so that the transmaps wouldn't have that much unused space.

-- I'm not mad at you, just Westphalian.