Don't forget that, when looking at many of these pictures, the tricks start long before Photoshop.  Standing in tip toe can give the appearence on longer legs but so also can a very low camera angle.  The pictures a few pages back show this very well, the one with the very thin girl is from a very low angle where as a lot of others are from a much higher camera angle.  OK the thin girl will still be thin but the proportions of her legs are silghtly skewed.

 

 

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.