The noise thing is interesting. Modern games tend to have lots of noise. There's often a noise or "film grain" post processing filter to make the game look less

The noise thing is interesting. Modern games tend to have lots of noise. There's often a noise or "film grain" post processing filter to make the game look less artificial. Lighting effects often have noise injected at many stages to soften and liven them up. This was really noticeable in Control for example, I think it may have been a surrealist stylistic choice. Modern video codecs (and maybe H.264 as well) have the ability to denoise to improve compression quality and then add noise/film grain back in after decoding. Theoretically the game engine could integrate with this by producing a noise map of sorts to add to the video stream.