Aiming at Individual Body Parts and Highlight Them

What system to use to identify the body parts is one of the main things I’m trying to figure out. I did try the phys material method mentioned in this thread:

And I was able to confirm different body parts with a line trace to those phys materials. Is there a way change the appearance of those phys materials to have a highlight outline? Lots of highlighting objects tutorials I’ve seen use a highlight material to make the effect. Is that in any way similar to the phys material?

Also would I be able to focus the camera on each body part once detected using the phys material method?