I have a scene with fixed two-point lighting plus an ambient skydome. The scene has a single figure in a wheelchair, and the wheelchair does a 6 second rotation on the spot. From one frame to the next, THEN BACK AGAIN, the specularity on the skin changes - at one moment being very apparent, and at the next being completely non-existent.

Also, beyond a level of 2, increasing the value of the ambient skydome has no effect.

I installed the new version of Poser, and the overall lighting is drastically different than before. Shadow blur radius is one thing, but my scenes are all uniformly much darker and redder.