So I've been creating a little test level and going through some of the video tutorials and I created a moving door that slides into a groove made in the wall. For some reason, when the door slides into the wall, on one side it shows the outline of the shadow of the door while it's in the wall, but nothing on the other side. I'm assuming this is a lighting issue but I don't have any work/cone lights shining into that wall and if it was the ones by the door I'd assume the shadow would show on both sides, anyone have any idea as to what might be causing this?