
One thing that is often tricky when you have a lot of uploaded art assets, is knowing which of them are actually in use.
I suggest adding two automatic indicators that would appear on each piece of art in your library:
- An indicator to show the art is used in THIS campaign
- An indicator to show the art is used in ANY campaign
You'd never have to show both indicators: if the first is true, the second is also always true.
You would only need this indicator for uploaded assets and not marketplace assets.