Do your sim’s traits affect how they pose for photos?

It is usually based on their moods. There are a complete of "normal" poses as well but if your sim is in a certain mood they're more likely to choose a a pose corresponding to their mood. I wish we could choose the pose even if it was something that was available only when you had the max skill. It would make taking portraits for my legacy walls so much easier. I believe if they're happy or fine they can choose anyone but how the game chooses which I have no idea.