Regarding the light artifacts:

This is Syd G2 with one active light. IBL off, Fill off. As the shadows attest, the light is off to her right, a bit above her head. The light's shadow cam has been adjusted and Lo, no nostril glow. However, the left side of her nose is being lit by... what? and the area of her neck in shadow has a stripe of light across it from... where? Apparently this is not the same problem as nostril glow. Does anyone have any idea what it is?

M