I'm stumped by those tunnel issues. I see them after I clear the blueprintcache.pak for Donner, but when I run the route a few times it goes away.
It also doesn't show, usually, in my actual Donner Redo route were I've been doing the editing.
I know that clearing the Blueprint caches too often can cause that on other routes, but the tunnel openings will self repair after awhile. It's a bizarre bug in the game.
The tunnel entrance decals are all there.
I'm going back and touching up Floriston in those screen shots in the near future. I'm adding some grass and redoing some textures there, although it already looks way better than those retaining walls did.
I'm also wondering if the new desert around Lawton and Mogul are showing up with the new soil colors and dry grass?