For the first one, I see why it would help, but why is it better not to use mugshots of other random people? I can't think of a way the real people are harmed b

For the first one, I see why it would help, but why is it better not to use mugshots of other random people? I can't think of a way the real people are harmed by being used in that group of photos. You'd also have the issue of the defense claiming that the victim could subtly detect the CG people, which would probably be true for the next few years at least. As for the movie extras... I think it's still more expensive to have pure CG extras than human ones, but I can imagine that might change in the future. It's kind of a small benefit though, right?