I can take a shot from one camera, then transform that 3d space to a perspective shot of another camera’s location.  I’m doing this in frames, having a bit of a problem when I have some spatial object wrap around the frame, hmmm … i’ll probably cheat right now (i’m sure there is some expression i could write but I need to ponder that out more).  Here’s my test of a AF camera1 to AF camera 2 node: