@Yesilyurt Saw you asked it in my Audi mod too. Here's what you do:

In OpenIV, go to .\Grand Theft Auto V\update\update.rpf\common\data Find visualsettings.dat and copy it to your local drive (just drag the file to your desktop) Open visualsettings.dat in Notepad Modify "car.defaultlight.day.emissive.on" and increase the number next to it Modify "car.defaultlight.night.emissive.on" and increase the number next to it Save the file and drag it back into OpenIV to overwrite the existing file.