Games Racing Game Progress

Here is an update on my racing SIM. I'm looking to add a little more realism. I'm still new to Unity so should I PBR materials or something else? Any ideas would be great.

 

Some ideas on how to improve realism in your racing game:
- stick to PBR materials as a first step as they are ment to produce more realistic lighting
- darken the overall lighting of the scene to make it fit the sky texture brightness
- make the camera move relative to your car to enhance the actual feel of controlling the car