Hi!! I am new to the forum but after referring to many similar problems and back to this thread I thought I would help since no one else provided a fix to getting the paintings back. After trying everything I couldn't get my paintings back off the wall, so after trying the super tech tips I kept seeing I went to super simple. I had my sim move, with the pack furniture option when they got to the new house it was packed in the inventory. I don't know if moving will mess with your challenge but for everybody else I figured it's nice to know, especially if you're like me and use the still life option a lot.