Just tried another car mod by a completely different author and same thing, no option to change paint colors. I'm stumped. The only other mod I'm running is PhotoVision. Would that have anything to do with it?

@Theoasterix I was using the default one that comes with the game install. Currently using this one https://www.gta5-mods.com/misc/gta-5-gameconfig-300-cars but that hasn't changed anything.

I changed the gameconfig file which didn't work either.

@Theoasterix no, I have not. Still using the vanilla gameconfig file. Should I try download a replacement?

@Theoasterix I also used the add-on option rather than replace.. If that makes a difference.

@Theoasterix Lamborghini Centenario https://www.gta5-mods.com/vehicles/lamborghini-centenario
And Ford 2017 Raptor https://www.gta5-mods.com/vehicles/2017-ford-raptor-hq-rigged-suspension-multi-dirt-animated-engine-tuning

When I take them into LSC, and go under Respray, I can change the the decals on the cars. But I can't change the colors of anything. I've had to use the Trainer

I'm very new to modding GTA V, put a couple modded cars into my game. When I take them to LS Customs, there's no option to change the colors of the car under Respray. Can you only change the colors via the trainer? Or am I missing something?