You can only use the pictures it suggests (for the moment anyways) but you should be able to retake them if you don't like the way it's displayed.
My issue is that I have created my dream lot and the first picture when I save to my library is a bunch of boulders rather than the house. The other pictures are fine but the main one is just a huge rock. It has only happened with this lot in Oasis Springs. Is there any solution to this?
I don't know if there's much you can do.
Someone has reported something similar as a bug here: http://answers.ea.com/t5/The-Sims-4-Bug-Reports/Gallery-bug-when-saving-my-lot/td-p/3510507
You might wanna add your voice there. Pics are great too.
