I have the Loft Apartment as well, along with a lot of other models from the same vendor, and have to say I have not noticed an issue with the preview.  The scenes I have created are with at least one V4WM or a V4WM and M4, both with clothes.  I don't think my set up is exceptional my any means.

Like others I do not play games......well not on the PC so that is not an issue.

 

 

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.