Which method is more natural with Sculptra: adding volume to the entire face or filling only in sunken areas?

I don't have much fat on my face, but my cheeks look a bit sunken, which bothers me because it gives me a tired impression. I'm worried that filling just one area will create a volume difference compared to the surroundings, but I'm also concerned that having the procedure done on my entire face might alter my original face shape.

I've heard that Sculptra works by gradually generating collagen, so the results are natural, but I'm curious about the actual best areas to treat. For those who have received the treatment, did you focus on specific areas, or did you consider the overall balance of your face?