@BigAl3D
Hi
I did not try to make the point, that the image does not line up with the car (which would be very dumb), but that the Image of the shadow catcher is not in correct aspect ratio, Compared to the corrected aspect ratio of the background image. The car in the second screenshot is not the subject of this issue, it was just there, as i came across this issue during working.
I used the extreme viewing angle, only to showcase that the shadow catcher does not allign with the background image, of which i corrected the aspect ratio.
I downloaded V8 with dome mapping, and it is great for what it does. But when lets say using a larger focal length & trying to render out high resolution renders, corresponding high resolution backplates are the only way to go, as even a 16K Hdri is limited with it's resolution (and some other aspects)
Thanks!