If it's strictly associated with that piece of armor being worn, and you aren't using UNP and you did't fit that armor yourself, don't bother with BHUNP or UUNP (presuming the model is UNP-based in the first place...idk if it is or it's CBBE), since that's very unlikely to be your issue. There's clearly something going on with the armor/armor-fitted body (look at the neck seam. there's shiny below , none above) . In my estimation, either
a) you fitted armor to a body off your own that was created with a shiny texture, or
b) you installed an armor that was created using a shiny body texture by someone else.
(there is a difference, in the first case, you would have had your own shiny body used to fit the armor, in the second, someone else did and you're just putting it on without any further fitting. (since fitting requires using your own body to fit to)
In either case, it's apparent that the shiny is only on the body, based on the texture disconnect at the neck (head doesn't have the shiny, body does)
PS> idk if you use CBBE or UNP as the basis for your player. If you use CBBE, then use CBBE armor or deal with the disparities when donning a piece of UNP designed armor/clothing. I have a few pieces that I use, and although there are certain screwinesses when doing so, I just deal with it, (as long as they fit relatively closely) because I like the pieces more than I like not having them.. Nothing's perfect, and no afaik you can't fit UNP gear to a CBBE body or visa versa. (at least I don't know how to)
My comments on BHUNP and Vortex were because I sometimes see the vets disparaging Vortex and SE methodology and encouraging people to behave as if this was LE and the time was 2014.... And it kinda bugs me, because I've never once experienced the stuff they claim is going on and have used Vortex the entire time I've been playing. (started playing in ~feb of 2019) I respect their opinions on some things, but I see a clear bias that comes from them and I feel a certain busybody need to battle it. I don't know how Vortex was 2 years ago. I do know how it's been over the past ~year. Pretty darned solid.
And regarding UNP... I do realize that "UNP is dead" is a mantra among the hardcore vets re: skyrim SE, and perhaps that was once true,maybe even tru in the long term (I wasn't able to do any bodyslide work on UNP when I first started playing, and at the time, you really had to dig down in low level to do anything with UNP-ish bodies, or at least that was the impression I was left with at the time... so I'll give them that much) but it sure doesn't seem to be the case any more or at least for the nearterm future if not lonng term (I've read a ton of comments from people over the past year that prefer the modeling of UNP, regardless of any superiority of CBBE wrt tweaking the body bits.
Rhetorical question: If UNP is so dead, why was BHUNP just release within the past ~month or so to both SE and LE, and second, why have there been a massive number of UNP follower/companions converted over the past few months? My conclusion is that UNP isn't nearly as dead as some claim, again,regardless of any superiority in tweakability in CBBE over UNP or not.
- If you read this, No offense Jim, but I disagree with your stance on both UNP and Vortex.
Sorry for the lengthy post. I suck at being brief. ps> edited for typos and content.