I need it because the M2 Max GPU is too slow for my world. I made an open world 4x4km and even with world partition and only with foliage (just grass, at 150m max render dinstance), 3 rivers, a lake and an ocean, it runs at 40fps in the editor and around 50 in the final build, no other objects are placed in the scene. The cpu shouldn’t be the problem judging from the Xcode graph and neither the ram occupying 2gb (out of 32 max), so I wanted to try to decrease the rendering resolution and use the FSR, which is the best that runs on all platforms being both DLSS and XESS only for windws (and DLSS only for Nvidia). The TSR doesn’t seem to be that great and as I said MetalFX doesn’t seem to have a version already written for UE5 and I don’t have the graphics and mathematical skills to make it work by creating an ad hoc plugin, the FSR is the most obvious choice. Unfortunately I just started UE5 so I don’t have the skills to optimize the game, or at least I don’t have them yet.
Edit: obviously it will not be a default option but it can be enabled for those who need it