Thanks for those comments guys. Since I've never grouped objects and components nor stamping, it only confirms that I'm not using sketchup correctly...
@ Snodsy : could you point me those tutorials? That would be very useful.
I've worked more on the dome and a cut-view. And I realize that I need to "place" my different portions in it to get the proper dimensions and shapes. In other words, I've done it the opposite way with the rail station... (it could fit in though, but I'm struggling to put it in place...)
I've done a test about labels for the rail station.
### Latest WIP ###
Nissyr Arcology.jpg
Should I hide the lines of the dome? And I've no clue to do trees/crop fields...
Thanks for the tips and help!