Yesterday I ran into an interesting situation that I hope members can shed light on. I did a shoot of an interior designer in her home with several pieces of framed art in the background.  One was a large framed print of a Picasso. Another was an abstract of an unknown artist. Both were framed posters used for decor. In both cases they were enough in focus to be recognizable.
So, here's what I'd like to know.
Can I not have either of them appear in the background because I don't have a (property?) release from the artist?
Or, since they are both reproductions, can I not have them appear in the background because they are products of the printing company?
Or, is this not an issue, because they fall into the same category as any other decor objects in the house (Ethan Allen furniture, distinctive lamp.)