Hello there! So I've had this bug for some time now but I never found a fix for it. I noticed a few other people also made posts about it on the forums (and I also made one on reddit, will link at the bottom) but nobody had an answer, or fix.
The bug:
Some outfits and motifs have a very noticeable line right in the middle-back area. Most noticeable repro for this would be using the Thieves Guild Leathers costume (or light motifs). It only occurs when being zoomed out, and zooming into the character slowly makes the "seam" line disappear.
Repro Steps:
1. Equip Thieves Guild Leathers costume (or other motifs like the Thieves Guild light variant, Breton Hero Costume, Ebony Armor light, Xivkyn Armor light, Fate Scryer, Crimson Light Chest)
2. Zoom out
Optional: 3. Zoom back in and notice the lines dissapear
This is not game breaking, and obviously it only happens for just certain motifs, but it would be really nice to get a fix for it if possible. I've already tried turning up/down every single video setting, disabling certain options, addons, etc. Nothing works.
Thanks in advance, and have a good day!

Additional Links:
https://forums.elderscrollsonline.com/en/discussion/402259/weird-lines-on-my-character
https://www.reddit.com/r/elderscrollsonline/comments/lydsk6/visual_bug_with_some_outfits_costumes/
https://forums.elderscrollsonline.com/en/discussion/456901/visual-bug-white-line-going-down-back-and-butt