While Apple's MetalFX hybrid spatial/temporal upscaling solution was previously assumed to be developed in-house, closer scrutiny of the app's legal info by Notebookcheck.net has revealed the solution to be based on AMD's FidelityFX Super Resolution (FSR) technology.
This makes sense if you remember AMD announcing FSR as an open-source project compared to Nvidia's proprietary DLSS, which requires its Tensor cores to function. Apple was a little less forthcoming about MetalFX being built on top of FidelityFX, but this revelation bodes well for AMD, Apple, and gamers alike. For example, the recent open-sourcing of FSR 3 and its Frame Generation technology will likely make its way to Apple platforms, further improving their performance capabilities on Apple's silicon.
