Hello, Not sure if this is a mod issue or a core game issue but I've noticed some trains appearing to have windows that look as if it's raining when it isn't (using wipers does nothing). The windows look all distorted across the whole train but when the camera is further away the issue disappears. It has happened on the class 323 and 158 for example. If anyone knows how to fix this that would be a great help as this issue makes it impossible to drive from the cab when you can't see out at all.
It's most likely a mod. The only times I've had this issue on pc is when there's a mod involved. So go through your mod list, remove them all, run the game and then add one by one until you find the culprit
If you have this mod, if not this mod, then it is a mod hunting you will go as stated by rennekton#1349 TSW5 | Train Lighting & LOD Fixes v4.02 - Train Sim Community check that it's updated. There is a post on there by another player "Scroll to bottom see screenshot"
