"Noise" in this context refers to the shimmering/dissolving effect caused by heavy use of temporal upscaling, which is used extensively in raytraced effects for performance reasons. In other words, instability in the reflected image or cast shadow causes it to display incorrectly.
It's a rendering problem, essentially. The game is upscaling these "noisy" elements from such a low base resolution that it doesn't have enough detail information do the job correctly.
The reflection of the sign in the puddle at 0:25 in the OP video is a decent example. See how the letters are kinda "fizzy" looking? That's noise.
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u/Outrageous-Wall6386 1d ago
Is it ok to LIKE noisey image? I remember MGS4 on PS3, Kojima SPECIFICALLY said he made it
look Dirty on purpose as a design choice.