I usually add 4k noise to my characters and props to add realism but doing this on the camera makes more sense and may very likely, make me not have to use such high quality maps to make things look good -unless I have to use the characters and props in an external program like Omniverse that may or may not already have them -but why not make iClone look photo-realistic? especially if the amount of coding is not too much?

Reallusion wants to create Real time photorealism as much as possible, if this is true still, I recommend:

1. Realtime & Export Dither to remove banding and seems to fix high frequencies that TAA is normally used to fix but TAA just not only blurs the frequencies, it blurs the details - no good.

2. Focus Grain Levels/camera sensor noise - renders may look more photo realistic, even with lower Global texture resolution.

An interesting read about dithering:
https://bartwronski.com/2016/10/30/dithering-part-three-real-world-2d-quantization-dithering/