Quote - Unless, of course, the specular highlights are baked into the texture.  In which case, no matter where the spot is located, the highlights will still appear in the same place.

Yep that is another possibilty but if baked in I would expect them to be more central, I never use a baked in highlights with the eye so I must admit I didn't think of that possibility.  It does make it more important when placing the lights but I think it looks more natural, assuming of course the model is close enough for the highlights to make a difference.

 

 

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.