Building from Shooter game

How to build this structure:

https://docs.unrealengine.com/latest/images/Resources/SampleGames/ShooterGame/ShooterGame.jpg

it’s from Shooter Game | Unreal Engine Documentation

When creating the mesh, it is based of multiple parts or one whole?

How to make hexagonal transparent texture on outside wall of the structure ?

Here is an idea, go download it and open the free example project and see for yourself how its made???

You can download it in the learn section of the launcher…