Fixed spot external camera

I miss the external camera that existed in the FSX “fixed spot”(for helicopters) or the X-Plane 11 - as the primary view from the outside.It consists in watching a plane turning on the screen, for example, and the scenery does not move in the background.Apart from the aesthetic value, there is another advantage here, especially for weaker computers: frame rate does not decrease significantly.There is a “smart camera” which behaves similarly but positions itself at a certain point with no choice.Has anyone tried to design it ? Best regards.