hi , I am relatively new to UE4. so I created a third person level and merged a demo level from something off the marketplace. used , window/levels/add existing. and added the demo level. it put both levels together , live and in motion and everything , I can edit things and duplicate and move , etc… that is , in the editor , but when I click play mode and my character drops in , all the demo stuff is gone. character works fine and is in my level but anything I moved and everything else from the other added demo level is missing. is there a way to have both in the play mode? I want to use some assets from the demo level and test it live with my character. thanks.