While doing the long run in the ICE train to Kassel I experienced many points in the journey where the sky textures would start to turn into big black boxes and eventually black out the sky. However a brief fix to this is switching from the first person to external camera https://www.xbox.com/play/media/SM8P5DL7
I am experiencing texture glitches on Series S. It is under the fuel tank on all the Class 66s on the Training and SEHS routes. It also happens on the MFA wagons on SEHS but not on the Training route. I don't have this issue on PS5.
I had this same issue on series x with the black boxes in the sky, and yes same as you when I went to external camera then back to cab they go away, though one time it took to try’s of that I think it was somewhere between Fulda and wurzburg where I experienced this issue
