I am not quite sure what you mean when you say you have changed the victoria skin texture map.  If you mean the image map that is plugged into the Diffuse_Color on the poser surface in materials then this will have no impact on the bump of the skin.

To have bump on the skin you need a suitable map plugged into the Bump on the Poser Surface.

You dont say which version of Poser you are using but if you are using one of the latest versions with Sub Surface Scattering then EZskin2,a free script by the amazing Snarlygribbly, (alternatively you could use EZMat that has the EZskin built in - there is a sticky on this forum) would be the eaiset way to adjust the skin to render well

 

 

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.