Exporting Current Level (w/ Actors)

I’d like to add the ability to export the current level (actors and all) as a .fbx or similar 3d model file. Is there any way to do this?

Edit:
If this is not possible, how can I save the map within the game?

Still looking for an answer… is it possible to export a 3d model? If not, save the game’s map for later?