Racer do have much potential in terms of graphic. Below is some old screenshot when I was playing aroudn with HDR. The first two was using HDR cubmap as environment, which imo looks quite convincing, and they can get event better with more detailed car body. And the third one uses a simple scene without any pre-shot cubemap, and most of the work goes for tweaking the post effects atmosphere and camera settings. All screens are just what they are without any photoshoping.