Your pictures completely miss my point. I referring to to cuttings and embankment created when we create a railway line (or road), not the natural environment.
You can see these clearly on a picture I posted on Train-Fever.net:
https://www.train-fever.net/index.php/Thread/4639-Graphics-glitch-in-Nordic-DLC-build-7554/
The creators of the Nordic DLC say that this is a deliberate ‘feature’. Decide for yourself if you like it, if you do that’s great, if you don’t I’m showing a solution.