The patch definitely did nothing with the shimmering and aliasing in performance mode but to be fair no-where does it say it does.
There must be some kind of DRS in performance mode too as it was even worse than I remembered in town where there are lots of NPCs.
Not sure if anything can be done as 60fps with so much foliage and geometric detail must be hammering the PS5 but fingers crossed as I can't deal with 30fps on an OLED.
Checkerboarding obviously just really falls apart when there is so much granular detail and so much moving foliage.
I'd take 40fps if it was possible or a third option with a lower resolution native image even if it would be blurry as at least the alpha stuff wouldn't look so bad and on an OLED your eyes are drawn to all the aliasing.
The problem is that increasing framerate disproportionately affects performance. It's not 1:1 like it is on PC for most games. What we are seeing here is what we saw in Dying Light 2 and Guardians of the Galaxy where a game that is basically locked at native 4k 30 fps has to drop its resolution all the way down to 1080p just to hit 60 fps.
So 40 fps at native 4k or even 1800p might not be possible. Thats an increase of 33% more frames at the cost of roughly 40% in pixels. In theory, it should be enough, but looking at how blurry this game is in performance, I highly doubt they can get 40 fps at 1800p. Maybe at 1440p.
Ratchet had to tone down a lot of graphics settings to hit 60 fps at 1440p even though they had it running at native 4k 40 fps. They turned down lighting, reduced skybox detail, NPC crowds as well as lower quality reflections. It lost a lot of its visual flair. They had to do the same thing in Miles. Reducing NPC counts and traffic density in performance modes. See below. From what I can see, GG didnt turn down any detail. The insane amount of foliage present in the quality version is all there even in performance. The draw distance of foliage is the same as well. The NPC counts are the same. If they maybe turn down some of those settings to PS4 Pro levels, we might get a 1440p 60 fps mode.