So this is something I originally noticed at the release of the Isle of Wight route, but at the time I believed it's only an issue with Rivet's class 483. But since then I found out that it happens in other trains as well, so I suppose it's a core issue, not train related. The issue is that when you shine your in-game flashlight onto glass surfaces, they turn white. The pictures speak for themselves, I don't think I have to explain further. Must be somethng with how TSW2 manages glass materials, as this wasn't an issue in TSW2020, if I remember correctly.
Forgot to include these pictures in the original post, which shows the first time I encountered it and it's like the worst offender out of all my pictures. Anyway I submitted a support ticket, maybe it will get fixed at some point. Best case scenario it's just a wrong value for glass materials and is an easy fix - considering glass surfaces worked just fine in the original TSW.
