those are the subdividing mat zones, or some of them anyway. If you want skin tones applied in true space, you'll have to select them, and apply the skin texture to all those parts. skin arm, skin forearm, fingernails, skin thigh, skin shin, skin foot, and toenails, likely nipples as well. if there is supposed to be a lace glove look, or some such, then a texture and transparency would need to be applied.