So, the wiki currently reads "This tag is used when the shape/outline of a character's nipples can be seen through, for example, clothing." The way I've seen it used so far, plus its current wording, seems to imply that the nipples themselves should not actually be visible. But there is no direct clarification for whether or not the tag applies when PART of the nipple is covered, but still outlined within the covering, while other parts are actually peeking out. Anyone know whether that does or does not apply?

lets take a peek at what the bulge tag alias said if there was a difference nipple_bulge

By the looks of the wikis, it seems to be applicable even when part of the nipple is showing so long as there is still visible nipple shape under the clothing

Bleh. I'm...I'm not able to brain tonight, it seems...Okay, trying this one last time, now that I've noticed an alias already exists...

The wiki still doesn't say explicitly whether or not it applies when part of the nipple is out in view, and the "official examples" don't answer the question, either. Could be, the auto-examples given just because they're the most recent images to be given the tag, are simply tagged incorrectly.

The nipple_slip tag is what should be used when part of the nipple is uncovered, according to its wiki page. Clarification of that could probably be added to the nipple_outline and nipple_bulge wiki pages to make it less confusing.