I have been using GoPhysical almost since launch and it works well allowing the conversion of Firefly materials to Superfly by just clicking.  Basically it create a PhysicalSurface and connects the image maps plugged into the existing PoserSurface.  This leaves you with a material that works in both Firefly and Superfly.   You may want to adjust the Roughness and Metallic settings to make metals look their best in Superfly but this is easy enough as GoPhysical  also has a 'Make Metal' button.  The script really is a dream to use and can convert materials quite literally is seconds saving many hours if a lot of materials need to be updated.

I have also used GoPhysical to convert some Blender materials (for content that does not have a Poser option as it is purchased from a non Poser marketplace) to work in Poser and Superfly and again it works well.  The only issue it seems to have is that glass materials and anything with emissions tend to get missed.

 

 

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.