Could you expand on that? That sounds really cool!
Eh i don't know what more i could add.
Some things are noisers than others, some things are more important to the image than others, some things react well to the daz denoizer and others result in visual artifacts. it depends. I do consistently run the faces at a higher sample than the rest of the photo.
the original. the noise is especially bad in the face, the body is acceptable and the background is "clear"
i use spot rendering tool on just the face and its super fast. if you dont blur the edges you might end up with some ugly visual artifacts or straight edges that wont clear up when you denoise the image and do other post processing.
You can see where the original meets the more detailed render but its fine. there wont be much detail in that area and it will clear up in post. you apply this to a new layer so that you keep the original renders in case you need them.
How it looks at the end. You cant see where they meet and this is very zoomed in.