Heh, it's kind of funny to see how many things are called AI that aren't AI, remember that when we see discussions in HN saying articles are AI or replies are AI.
I suspect quickly slapped together 3d renders photoshopped into actual landscape images. With very limited attention to detail when it comes to matching perspective or lighting between render and photo, or when it comes to blending them together
There are more images like [1] that are just the cheap 3d renders, with less of the photoshop butchery
You can see a copy of that last image (3rd in the gallery) from 2017 at https://web.archive.org/web/20170707052808/https://www.ship-... and at https://newatlas.com/stad-ship-tunnel-interview-terje-andrea... .
A copy of the first image in the gallery is at https://dozr.com/blog/stad-ship-tunnel dated 2021.
Edit: ahhh, 2017 and 2021 were the previous two big announcements about the tunnel. See my notes at https://news.ycombinator.com/item?id=48597546 .