I am not going to answer your question since I don't know the answer.
But one thing I want to point out. This is of course just my opinion:
I think a lot of people who carry, think that they are much more obvious than they really are. First of all, I don't think that 99.9% of people are aware of what is going on around them enough to notice something like you printing. They are self absorbed, the are looking at their cell phone..........Second, you might have SOMETHING under your shirt that a close inspection might notice, but that doesn't mean that it is a gun, or the person seeing it perceives it as a gun. It is probably just a cell phone or what ever. Even in today's world where concealed carry is common, I don't think most people really expect or even believe that other people are carrying a gun.
Keep in mind that when you are examining yourself in the mirror, you are totally focused on looking directly at where your gun is, with the goal of trying to see it. Typically in order to clearly see it, you are standing in a semi-ackward position such as holding your arm up and the air and thrusting out your hip (or whatever). When you are actually going about your daily business you have your arms at your sides.....................
I am not saying it isn't possible for someone to see that you are carrying. I am not saying that no one has ever been noticed. However, I personally don't think it is highly likely unless your are really doing something over the top.
FWIW: I carry a full sized pistol in an IWB holster. I don't wear any special clothing. Lately, T-Shirt and Shorts. If I move a certain way while looking in the mirror, I print; but not bad, not anything that obviously screams gun. No one has ever noticed. Twice, I had gone somewhere with a buddy of mine wo is also a gun guy who has a CCW and I asked him if he thought I was printing. Both times he replied that he had no idea I was carrying. Point being this is a guy that carries himself and is into guns and he didn't notice. I hardly think other people are going to notice.