@asecbrush @nassosa @skaale, thanks
@scaale: 3DC is not unstable on a mac, I was rather talking about auto-retopology, more or less unpredictable. Last 3.5.04 build is fine and I use autopo more often now. Meanwhile new zb4 is more topo independent, so I started using 3dc for retopo and fast basic voxel sketches only.
Another two direct BPRs, only vignette and DOF map in Ps.
One question: What negative value of SSS on mixer means?