If someone can just tell me if there NCR armor looks like that when crouched, it would be very helpful... THAT'S ALL I'M ASKING.
I just wanna make sure I'm not losin my mind here.
To me it looks like a cut flap of an overcoat, one part is pinned underneath him (the left side, his right) and one part is hanging over. Most dusters/topcoats/overcoats have that type of split back, it prevents ripping/tearing in general (I wear a topcoat as my fall/winter coat, though I don't spend a lot of time crouched and then looking in a mirror from behind to see how it looks, but I imagine it's possible it could look something like this).
Please stop bumping this over and over. The other possibility is that, yes, it's a graphical glitch. And it's highly doubtful it's a priority to fix, if it is indeed a glitch.