[Digital Jedi]

Originally Posted by Amaury25

If you didn't make 'em, you cannot use 'em.

Well, "royalty free" means you can use them, per the terms of their acquisition. It's kinda the whole point.

Really, use of each image would depend on the specific license issued with each one. Sometimes there's a time limit, instance limit or other arbitrary specification. Because of this, if I download a royalty free image, I don't even bother with it unless all commercial/personal restrictions are lifted. Odds are they'll never even know what I do with a specific image, but I prefer to avoid any potential hassle down the road, and certainly don't want to keep track of each and every unique license. (Though if it's for personal private use, all bets are off.)