Hi,
Wouldnt it be relatively simple to have a button that goes through all assets in the content folder and checks if any actor is associated with it.
I would find it quite handy to have a simple way of clearing out temporary standßin assets of which no instance exists in the level anymore.
The same with materials. A Material that is used nowhere, should go.
If a texture is not used in any of the materials, gone with it.
etc…
Cheers,
Klaus