Only tried it once and the difference it made for me was that, after an hour, all I had was some pretty colour patterns and a render progress bar that had not moved.  The same render with IDL and SSS would have either finished or would be close to finish in the same time.  If I want something that slow I will use Luxrender at least there I can see something happening and I can also suspend and resume later rather than leave my maching running all through the night.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.