Help with a Munbase?

[AxSirlotl]

I'd like to know whether the tubes joining together the modules of the outpost are in KSP or are they from a mod? Also can kerbals be moved around through them to different bits of the outpost? Thanks!

[technicalfool]

They look like a mod. However nothing is stopping you from using structural parts or an empty SRB with attached docking ports.

 

You should be able to transfer crew through most parts so long as they aren't connected with a junior docking port. Best thing to do if unsure is build it on Kerbin and see!

[Plusck]

They could be a mod. They could also just be empty Mk1 fuel tanks, and they would work fine. A mod might provide ligter parts, but at least with fuel tanks you can use the contents on the way and avoid having a flippy craft on leaving Kerbin.

And Kerbals can transit through naked girders, as long as they have a standard-sized docking port on the end.

[Vim Razz]

In this case, they're the old version of the Structural Fuselage.  If you like the look of the old fuselage model better than the current model, then I think there are mods that can add those part again.

Both the old and new models are passable in stock or with Connected Living Spaces installed, though at the time that particular base was built their use was purely decorative. (It uses Temestar's old modular base building kit from a few years ago.)