By quality, I didn’t mean resolution.
If your min shading rate is very low, for instance, or your pixel samples too high, or you have more RT bounces than you need, you can significantly increase render times without seeing any noticeable difference in end results, even at high resolutions.
The reason I say this is that you said you use Poser render presets, and the final quality settings for preset might be a bit of overkill. Best to test your settings until you find ones that work for the level of quality you need, and then use them, rather than presets, which are not tailored to your particular needs or your particular scene.
The final quality preset has a min shading rate of 0.10. You can change this number just on all the hair parts, perhaps to 0.5. That might also lower your render times.
That’s entirely likely. I don’t know as much about the rendering functions as I should. Too jammed up usually with work to play with them much.
I have noticed sometimes that final render isn’t much different from a pre-set with the shadows & basic ray trace turned on.
And for the other commentor, I’m using P7—so anything after that is unlikely—but as I just said, I’m not a power-user on renders and that kind of thing.
More than a hobbyist, but….