I'm pitching my game to a potential publisher and want it to look its best. I don't have the money to pay for custom art, and so I want to use images that I've downloaded off of the internet. Obviously I would need permission to sell a game with someone else's artwork. But would a publisher care, however, if I'm using "borrowed" art for my prototype? I've searched extensively and can't find anything in the public domain that matches the look and feel I'm going for.
So I find myself wondering: am I worrying about nothing? Is it unprofessional to show a prototype with unlicensed images? Would this hurt my chances at selling the publisher on my game?
Having been a long-time lurker on BGDF and the BGG forums, I just know that this issue has been addressed in the past, but for some reason, I can't seem to find a post that addresses it directly. Can someone please help me out and point me to a previous post that addresses the issue?