By default, the unreal engine uses TSR in the viewport. If you enable FSR in the viewport, it replaces TSR. Then you can use the drop down menu in the plugin settings to switch from quality to e.g. performance, then you will only see a difference in the fps.
Having problem on Mac something about setting FFXFSR3 SETTING
fyi there is a plugin setting to allow in editor but it honestly doesn't seem to make much difference for my fps for some reason. Any thoughts?
By default, the unreal engine uses TSR in the viewport. If you enable FSR in the viewport, it replaces TSR. Then you can use the drop down menu in the plugin settings to switch from quality to e.g. performance, then you will only see a difference in the fps.