Using Sunken_Highway_mdk_813 as habitable terrain like

[Caliber]

I use Sunken_Highway_mdk_813 for terrain mountain barrier i place some roads to make it habitable. And its look cool. If you want a decoration at the top of the Mountain i recommended to use 1ElevatedTerrain1-5 find it on plugin section of this site. I hope you like it

[mdk_813]

Why don't you just use this?
https://theotown.com/forum/viewtopic.php?f=58&t=4997
Looks better than metal imo

It isn't really supposed to be metal but concrete
But I agree, it could be interpreted as metal too

[Caliber]

Just make them more yellowish and they'll look like concrete more.

or he can add yellowish Sunken Terrain Plugin. More power guys

[mdk_813]

I had made a more yellowish version of the walls before I released them, but I didn't like them and decided to stick with the ones that you know.