They spawn randomly on planets, like their default underwater version on Oceanics. Planet from the screenshots is this mod.

are these citys in like there own planets? or they jst spawn in normal planets?

Anytime

Thanks, I will def put some time into this

They aren't for me, on the last 2 screenshots you can see people walking around who were in range at one point or another. One of the mods in your install is most likely screwing either with turrets or the npc files.

Turrets in the city are killing hitols!

Oh, and .dungeon files what tell the game which rooms combine with what you'll have to copycat from the unpacked game files.

This is the tutorial what I followed:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1660027998

For this "dungeon" in particular it has 2 "layout" prefabs with an x amount of "room" slots inside those prefabs.
Rooms are designated by invisible spawn blocks what you can place inside the Tiled map editor, bottom, middle, and top rooms respectively (or start, middle and end). And also can have a sub-variatinon with some furniture changed around.

The best way to figure this stuff out would be to just unpack main game's files, and open the dungeon .json's from there using Tiled, and look at how Chucklefish did it, as well as read the guide what I posted.
Also fyi, your dungeon too must be inside the 'dungeons' folder of that unpacked stuff so that the map editor can load all the game files for you to use. And just copy it over into another folder (with preserved folder path up to but excluding "unpacked") when posting to Steam.

how do you go about making a mod like this? structure generation?

Cool mod looks good

Glad you like it

thanks for this mod man, i really like it thanks :)

noticed that yeah it works on FU

Assets are all Vanilla, and the spawns are all set on Vanilla planets (+ checks for the 2 modded ones), so I don't see a reason why it wouldn't be. But I don't use FU so can't tell for certain, ymmv.

Is compatible with FU?

Yes, /placedungeon hylotlmegacity should do it.

is there a megacity place dungeon command?

yabba

Well, I'm glad you found it because it's giving me ideas.

Unfortunately no, I just searched "pixelart skyscrapers" online and cropped into square the one I found most fitting/good looking.
Original is from wallhaven .cc /w/83m6lk

Did you make the cover pic? It's wonderful.

holy shit thats beautiful

ill download this for when i eventually return this game next year

That's a random star from TrueSpace, yeah. I also run a mod what adds vanilla stars to the universe as well, but I'm not sure if it actually functions though.
The UI screen there is PlanetSearch, a thing what saved me a lot of time and helped with testing immensely.
What else, the Hylotl puddle helmet is modded for more edgyness points, Hylotl themselves are a reskin what's one of the popular ones, can't remember which one. And "Everyone needs glasses" I believe gives npc's well, glasses as an option.

If you can, can ya also mention some of the mods you used in the screenshots? Especially with the navigation screen? That star's from truespace, right?