This game is so good but it's plagued by this damn terrible, interpolated-y, delayed mouse input it makes me genuinely wanna puke; it feels almost exactly like my RIL patches feel when I disable the per-delta mouse override (i.e interpolated 60hz mouse input).
So I unleashed AI at it :) I don't deserve to call the mod mine :D but IT DOES EXIST FINALLY!
I'll paste an excerpt of what Opus said once it found the section that treats mouse input for the camera:
What the camera does with the mouse, every 30 Hz tick:
Moving average: it averages your look input over the last few ticks, so each tick's turn is blended with the previous ones. That's the "heavily filtered" part.
Change limiter: it caps how quickly the turn speed may change per tick. Sudden direction changes get ramped in, which is the "linear interpolation / diagonal" feel.
Clock drift: the game's 30 Hz mouse update and the 30 Hz camera tick run on separate clocks. A tick sometimes gets the same batch of mouse movement twice, or misses one entirely, which adds uneven skipping.
What the fuck. IS IT THAT HARD TO JUST PASS THROUGH THE RAW UNFILTERED INPUT TO THE CAMERA EACH FRAME???? this is just like TAA stuff, I WANT TO SEE THE RAW PIXELS! I DONT CARE ABOUT DITHERING :D like at least give me the choice, it should be the easier route compared to these insane convoluted systems (I know why they did this: it was a port from console, but it still pisses me off).
So it's not even 60hz interpolated input; it's 30hz, filtered, dampened, interpolated input. Nice.
Mod fixes all of it and finally mouse feels great :D
Horizon: Zero Dawn Raw Input Mouse FixView fix → See ya.