i3470 with 16gb
Anything that improves quality erring on the side of high as opposed to low. I've found that rendering and re rendering test clips to shave time vs get quality i'm happy with can take more time than just balling a bit high and waiting it out.
I had to up the GI settings on these as there's some odd lighting work going on (2 suns, one really low and another that just lights the surfaces, and a very dim environment light). 2 layers of rock texture under the snow, of which there are 3 layers. I got some weird "black holes" after the snow but added a "compute normals" which pretty much fixed it (no idea why i felt to do that, odd memory from somewhere) 2 layers of cloud that isn't in the aurora, 3 layers in the aurora....
...there's a lot going on under the hood, half of it probably not needed...
...based around a 16KM 8K heightfield... (v3 eroded)
1920x1080 / Microply 0.6 - AA 0.5