I would like to have a custom structure I made replace the city_center structure of an ancient city, except when I do that, cities do not generate at all.

To make sure it was working, I replaced the tall_ruins structures instead, and then cities did generate again, but then those ruins did not generate.

What am I doing wrong? How do I replace one part of a city?

  • 3
    The tagging issue in the history is being discussed on Meta (which I realize I should have done in the first instance rather than getting into another edit war)
    – pppery
    Commented Jul 19, 2022 at 17:46

1 Answer 1


Edit: So apparently it was due to my structure not having a jigsaw setting the city center. At that point my structure generated, but not the rest of the city. The solution? More jigsaws.

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