Window Tint Issue

[Packie M.]

Hi guys. Pretty common problem here, I'm sure - sometimes even found on vanilla vehicles! Window tint is supposed to be applied to side windows and back window only, but pretty often due to wrong mapping it also applies to headlights and windshield. So in my case, it applies to windshield, is there any quick and simple solution to exclude windshield from tint map? Thanks

[Oleg]

If I'm not mistaken, this is affected by per-vertex color or per-vertex alpha value.