New Visual Technique

I recently had a new idea of ways to show the confessions I get. I originally thought of it whilst watching the news, when I saw a piece on students from overseas talking againgst their home countries. In this piece, the faces of the people were not seen as the only light came from behind their heads. Although this has been done countless times before, I am going to look further into it and see if there are any ways that I can customise this and use it in my piece.