Physics fps - what happens if actual fps is lower / how to support high frequency monitors

:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By ejnij

Once I started using camera smoothing, it was apparent that 60 physics fps was problematic as it made movement blurry if the camera was moving (with my higher frequency monitor). My game is 2D so I can afford going for higher physics fps, but I’m not sure if I should just throw a larger number or maybe change it depending on the player’s monitor.
If VSYNC is active, and the player has a 60hz monitor while the physics fps is set to 120hz, what would happen?
Is there a way to make the camera update in _process instead? Would that solve it?
(Though it’s not the same as the input delay advantage would still be lost)