I circled what I am talking about. What I am thinking it is, is more of a crease or a "lip" created from the bumper being two pieces and put together as a top and bottom. So it goes alway the way around the bumper and not just at the end. What do you think?
The backgrounds on all my renders are HDRI images. I put them on a dome and they are what provide the reflections in the chrome, lighting for the scene and background image. The base is a texture from the Dosch textures I got. Most of the time you don't see the background because of the sweep I use behind and under the vehicle. Just like a photographer would use.