Someone mentioned nipple piercings the other day
I remember not having any luck with anime models when I tried in the past
Quick attempt with EF and it seems doable enough if you inpaint
https://files.catbox.moe/as7k12.pnghttps://files.catbox.moe/ivld06.pnghttps://files.catbox.moe/zsg7us.pngOriginal
https://files.catbox.moe/z34kra.png