mmm i tried what you mentioned about level_load but the problem is that it cause a error, for example i lost my background that is image from my camera that is used for the AR part, because that is a entity(plane with the frame of the camera).

And the part of Augmented Reality is important for the program, but that part of the AR what i see that it does is create a entity(plane) with the frames of the camera and load some libraries that can detect a mark and return the position,rotation of the mark in general, because i didn't create that library and is a little complex to contact right now ,the developer who implemented.