Because it isn't an official game config, neither is it a config from a mod, but there are like 14 sunburst posted by like 14 different members that all look the same OT:
Guys, I recommend you to use this ReShade preset for your beautiful pictures! (Not created by me) https://www.beamng.com/threads/my-reshade-config.51827/#post-802215 OT:
coll ur modz is warm and bad 0/10 ign allow me 2 show u f00lz sum quality content this b teh civic is quality mod comrade! feetures: speedyboi