I understand that you're supposed to take 1 under exposed, 1 normal, and 1 over exposed and combine them with post processing software.
I've seen many beautiful pictures of people posing with this kind of HRD effect. How are you able to take 3 pictures of that person without moving?
Or do you just take 1 photo and darken, lighten them to create 3 copies and than compress? I'm so lost.