Weird Graphic Effects

That issue was also on TSW2 but it’s still present on TSW3, it happens while selecting any humidity conditions such as rain or snow, this is not gamebreaking but can the team look into it as this happens on every route with any train:

 

What are we looking at please?

 

The black stains on the white part of the train

 

Think this effect is trying to represent a partially wet surface. It’s sort of doing it. I’ve seen the effect dry over time on a route and also slowly gather over time. would be great if it fitted better with the raindrop effect on windows though.

 

I keep staring at the screenshot, but, for the life of me, I don't see an issue.
Isn't it just a bit dirty?

 

It might be trying to imitate a wet surface but I thought it was a glitch effect I find it weirdly made that’s why I was confused

 

You could run it through the trainwash a few times and see if that makes a difference