I am thinking of disabling the built-in denoiser. But that means I need to an external one. I've found Topaz denoiser but it, in my opinion, makes the image look pretty much the same as if I was using a built-in denoiser and a sharpen filter in PS. Not much difference that I notice. There is of course the problem with 4.2+ in Daz where, when using built-in denoiser, you can't have a camera point at a plane or you get fireflies the size of pterodactyls and there is no fixing that that I can find.