>>3458802There's no objective standard on how lewd the image can be really, there's a gray area where you'll have to gamble on getting your post deleted.
I myself had one or two swimsuit images deleted which were somewhat risque (one had nipple dents on the bra).
I'd just post it, jannies won't ding-dong you for it, if the images get deleted, they'll still be found in the archive, and you could make a follow-up posting a direct link to the booru or twatter or what have you if you really want to.