For example this truck which has a chrome tank, with relight it looks matte (upper part). Tried it with two different trucks on different maps but get the same result.
I think on modded vehicles that use Chrome relight might look a little brighter, besides that the matte look is intentional as I'm using it less as a reflection and more as a ambient light. Still looks good on vanilla vehicles since I tested it heavily on the chrome mac truck. I'll be tweaking it in the future but the matte look is staying