I’m trying to render screenshots of the same scene, same exact perspective, at different resolutions.
This works great when I increase/decrase the width and height of the shot by the same factor.
Original resolution (3840x2160):
Half resolution (1920x1080)
However, if I render the scene with mixed factors, the perspective changes.
Mixed resolution raw (3840x1080). We see an increased horizontal FOV:
Mixed resolution in the scene aspect ratio (3840x1080):
How can I control the camera perspective, canvas or screenshot settings such that the mixed resolution image looks exactly like the other two?