Ok /e/, the premise of this thread is simple. post images where the nipple(s) is almost made visible, but isn't quite shown.

positives:
+naughty angle: down blouse, from below, side boob loose shirt, ect.
+barely off angle: if you were to stand a little taller or peek down a little lower, you'd see it

negatives:
-poorly drawn circle boobs: try to keep it to some semblance of anatomical correctness in regards to shape (the size itself doesn't matter, go as cow or flat as you like).
-"missing nipple": if the boob seems to be missing nipples where it rightly should be, then it kinda breaks the desire to see it.