HI
@Mascot Thank you for your comments. This "rain" via a mod / app, is so new to me, I would not even know where to start on it, and it's strange as you say, one windows work, the other doesn't.
It's not something I have looked in to (me it's all about the handling) but this seems to be a 3d issue. I can ask my moddler to look in to it of course, but this will effect all the cars I have worked on.
Sorry not the answer you was looking for I know, but hopefully and explanation as to the problem.
Shaun