Completely agree that the Poser preview render enige needs an update to include all Root nodes options like PoserSurface, PhysicalSurface and CyclesSurface.

A logical step-up would be to go for Eevee as the Poser preview render engine.

The small Raytrace Preview is actually a part of the original FireFly render engine. => Checkbox in the FireFly render engine settings screen => Progressive mode, and was introduced before SuperFly/Cycles came along.

Best regards all and have a nice W-End, Tony