It's a yaoi has I think bdsm? Also is lowkey a love triangle I think one of the characters is a painter or sculptor that's all I can remember sorry
Under the Green Light
https://www.mangago.zone/read-manga/under_the_green_light/
This ?
A few came to my mind but none of them has all three plot elements you said, but it's wort a shot! For BDSM with a slight hint to a love triangle there a few short stories on "momentum" (it's a serie of short stories and I think starting from the third/fourth one they all belong to the same universe and there's BDSM, I loved that one), love triangle might be "from the points of three" but I don't think is the one you are looking for, then there's "lover boy", one of them is a painter and there's a love triangle but I don't remember any BDSM. Last there's "love or hate", I remembers there's a love triangle and some slight BDSM, but I'm not sure about if there's a painter or such....anyway, lover boy and momentum are great, so if you can't find the one you are looking for I would recommend those! Good luck!
https://www.mangago.zone/read-manga/form_of_broken_love/
Maybe this one?
I don't remember a lot but there's a guy and he was like abused or something and there's a girl and she saved him kind of but he wants to be the one to kill hr he has like silver hair and at one point she liked his eyeball?? I know this isn't a lot of details but if someone knows it plz lmk the name!!
https://www.mangago.zone/read-manga/failed_to_abandon_the_villain/
I think ? Sorry if its not the one
I hope this gets a paperback version because I would 100% buy!!
This actually has an upcoming taiwanese uncensored paperback comic edition for vol.1. Unfortunately, it's really rare for manhwas to get a paperback edition with a full english translation unless it's super popular like LIAL and BJ Alex so I wouldn't hold out much hope for this considering it's not well-known (actually most of BWAT's works aren't known ://)
Stop that can't be true their work is amazing?? I hope they get the recognition they deserve also so you know where to buy the Taiwanese version?
As far as I know, KOONBOOKS is the only official store that sells it!! There's also a Volume 2 incoming, still in Taiwanese though. There's also the Chinese site called KADOKAWA but it's in Chinese obviously and I find it hard to navigate.
Ok thank youu!!