I take back my last comment. The gray background is indeed a problem that needs a proper solution. Because in the Painting the Skin video to come, Kent bakes the hands and head, where the head will be solid gray. So since the background is also the same color gray, the head is 100% un-seeable, therefore prohibiting Photoshop from being able to make a proper mask. (There has to be something visible in order for PS to make a mask for it.
