(Elevated) rail has a very irritating corner texture, so I am here to fix it ⚒
As you can see... aghh! What is THIS? So, what you're looking at is the texture of a corner in a (default) elevated rail. And here's one way to fix it.
First of all, find the 'concrete' or 'stripped concrete' in All > Terrain > Asphalt
Second, and last, click these two tiles to create a concrete background.
Finally, here is the final results.
I can fix it! - elevated rail corners
Re: I can fix it! - elevated rail corners
Still same problem, but, most (2 out of 4) of the textures are already okay with this problem.