I have made renderings at irendering with 4 x 3090.
About the speed / efficiency with this setting samples per pixel per iteration, here are some test:
best I think. 17 secs per frame
50 Path Trace samples per pixel
20 motion blur subframes
difference is almost unseen. 17 secs per frame
50
20
difference is almost unseen. 17 secs per frame
50
20
Now this is slower, 32 secs to render. So we do not go there.
5
50
20
So how should I use this? Is there any reason to raise this even higher like 3000?
Or should just use higher sample value (the one that I now have 50 all the time) ?