I'm pretty sure those tail lights writings are 100% just textures. Multiple layered textures with different shaders to simulate the glass and the inner parts of the tail lights I'm sure. But definitely not modeled lol.Surely this level of detail is unnecessary. They modeled the writing and logos in the taillight!! What?!.. There's a great shot in John's DF video where you see the manufacturer logo, with all this texture detail with the metal dimples on its face, and then he pulls the camera back and you're like.. oh so that was just the detail on the tiny logo on that car.. in the middle of gameplay, huh? But uh.. this might be even crazier for me haha. Anyway, I love it.
They likely have access to the real cars so sourcing those shouldn't be hard.