Efficient UVMap for sure. But for the ease of painting I would personally prefer them a little more apart.

I'm a little puzzled about the "mid" - are they "folded in half" or does "mid" simply indicate the side that is towards the nose?

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.