Originally Posted by
Schizoide
At 100% resolution scale it's turned off.
If your game is running slowly, you can try maybe 90% resolution scale and see how it looks. Otherwise I wouldn't scale your resolution at all. FSR generally doesn't work well at 1080p output res as there isn't enough data in the lower-resolution rendered image to make the output look good.
If you do upscale, I would definitely use FSR. Point would look pixellated, bilinear/bicubic look blurry. FSR does edge reconstruction to make edges look sharp without being blurry, and applies a sharpness filter to make textures look better, so it's the best choice out of the four.