P12's adaptive sampling with threshold [___] can let you use high quality settings in Superfly without a huge render time penalty. If P12 Superfly sees that a given pixel has not changed after X number of samples, it considers that pixel to be finalized, and skips it on later samples. At the beginning of a render, progress will be as slow as P11's Superfly, but after a lot of pixels have been finalized, P12 Superfly only spends its time on the tough areas of your render, and you see the rate of progress increase significantly.

These are the settings I used for the Grey Havens test/promo renders:

Caveat: If your PC is Win7, it is not officially supported in P12. I'm on Win7, and so far P12 works (except the embedded store). My GPU is an old Quadro, so I'm limited to CPU-only rendering. You would need Win10 to make full use of RTX3090 GPU rendering power. P11 can't fully exploit the RTX series GPUs, and Win7 can't either.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5