I got tripped on the cam scaling too. As near as I can tell, Scale and Zoom are "the same thing." Nothing is really the same thing, of course, but they seem to do the same thing. It's possible that "existing" lights (the original 1, 2, 3, even if you changed them to spots) get shadow cams with Zoom and Pan, but new cams get the more primitive Scale and Trans. How do you tell an "original" cam? Its name is Shadow Lite # Cam rather than Shadow Cam Lite #. (Yes, I too wish I was making this up.)

And a potential cause of PanY whacking the camera off into some X: It wasn't PanY but PanX. Poser has a tiresome habit of presenting dials in whatever order it feels like, and when you are doing something like this, where you make "the same" adjustment to three or four things, it's a real PIA. My spot 1 shadowcam has Zoom, PanY, and PanX for controls, in that order. My spot 2 shadowcam has Scale, transX, and transY, in that order. After I moved cam 1 up to the face, I went to cam 2, dialed the second dial, and boink.

BTW, with Sydney G2, the first step -- fixing the shadow settings -- did nothing for her nostril glow. Not sure why. However, adjusting the shadow cams worked great. It fixed most of the nostril glow. I still see "light artifacts" that puzzle me, though. Some nostril glow bits (inconsistent and discontinuous) and light on her neck which should be in shadow. I'm suspicious that the IBL is causing them, so I'm running another render without it.

I have a theory question that's bothering me. I understood that the view from the shadow cam is a Light's Eye View of the scene, and I can see how Zoom and Pan would move the port around on the pane of the light. But they don't appear to do that, they appear to move the camera around on the X,Y global axes. Which is it? Is it Panning or Transforming. It looks like Transforming to me. The theoretical question: Does it not matter?

M
PS: I just did some testing and Yes, it does matter. The "Scale" shadow cams do indeed move according to the x,y coords rather than panning. To test this, move the camera slowly and watch whether what's visible in the center changes. With "Zoom" cameras the pane frame reveals new territory, but the plane stays the same. When you move a "Scale" camera across X, it behaves like an orbiting camera pointed at the scene -- which is wrong, isn't it?