But x265 is notoriously finicky. Bad settings produce "blocky" shadows or "waxy" skin tones. RARBG didn't have bad settings.
: Binge-watching TV shows and building a massive movie collection on a budget. Rarbg X265 Encoding Settings
Sample Adaptive Offset is often disabled to prevent "smearing" of fine textures. Replicating the "RARBG Look" via FFmpeg But x265 is notoriously finicky