This is going to sound snide, but if you are trying to get more views, the top one, the headless bust, would probably do better than either of the others....there is nothing like thrusting body parts to really rack up the points around here (I prefer the bottom left, actually, but it depends on why you are asking). She doesn't look particularly nude to my prudish eyes, but she's definitely wouldn't be able to wear that to my workplace without getting arrested...which might be an indicator that a flag is needed. Common sense, really...and since you probably made her dress transparent so her breasts would show and attract additional attention, you might as well advertise the fact with a nude flag to increase the hit value. I told you it would sound snide.