When I create an image plane in the side view, I also
want to see it in the other views - so far so good.
BUT, when I adjust the alpha in the side view image plane,
the Perspective view is not affected and remains a bright
solid.

How do I control the brightness / color / contrast of
the "other cameras" view of my "side camera" image plane?

Also, how can I move the image plane(s)?

Cheers,

TH