Do you remember these pictures? Are there really such pictures? I would just make it clear to him that it would not be a good idea to publish them as then you would prosecute and sue him to within an inch of his life and if you hear anymore from him or about them, etc. you will contact your lawyer and perhaps the police.

Don't let him know you are concerned or interested; call him on his bad behavior and hold your head up. It's your body, but it is not "You". Yes it would be extremely embarrassing if there are such pictures and he somehow published them so friends and relatives saw them but if they love you they too would be angry you were treated this way and it would not be your doing. I just remember back when it was risque to see a woman's ankles and think of it as "body parts", it's not like those looking would see anything unusual they haven't seen before. People you don't know who see them, it's a picture like a magazine picture, and you don't know they have seen them. People we don't know, don't count. It would be an "object" to them and You are not an object.

I went to a Halloween party once as a "flasher" (I'm female). My girlfriend took a picture with my raincoat open, gave it to me, I dressed (had brought my clothes along) and joined the party. No one else saw me and I controlled the picture. My "costume" came in third place What I remember was handing the picture to friends and they would gaze at it and say, "Who is that?" I'd take it back and reply, "Me". A picture of you isn't going to stick in a friend's brain, it doesn't make sense in their overall knowledge of you and the other people don't matter.

Assuming he could identify people that would matter to you AND get their contact information so he could send it to them, personally and make sure they saw it (very big if in several cases for several reasons) those people are going to see "him" and not like him more than any amount of making fun of or embarrassing you, if such pictures exist.

Stay strong and angry is what I would do. Tell a good friend you love and trust what is going on and I'm sure you will get support and anger from them too. He should be ashamed of his behavior, you have nothing to be ashamed of. Do not give him the upper hand by "minding"/allowing his bad behavior to get to you.