Jacksonville didn't have a proper map and the autogenerated map wasn't correct, so I made a new one.
I took the outline from this track, to make the map.
I liked the checkered flag at the start line, so I let it in and by suprise it gave this nice fade effect.
Link to original track mod:
https://www.racedepartment.com/downloads/jacksonville-superspeedway.2664/
For other Jacksonville fixes(by Phoenix77), camera's and AI lines:
https://www.racedepartment.com/downloads/nascar-cams-pack.10040/