Black Camera possession problem

Well, I’ve been working from the Top-Down game template, and now I have this problem. From the editor it appears like this, with the borders of the elements unaligned and moving strange when I move my editor point of view. Then, I run the game, but while possessing the Pawn the camera goes black. I tried to launch the game just to check and surprise! the third person camera works just fine. It only happens in editor, and I haven’t found anyone with a similar problem. Any clue to this?