City generation on an existing Minecraft Map ?

[data-dataninja]

Awesome plugin!!
Is there a way to generate the CityWorld on an existing map?

Like worldpainter, u import it & paint citybiome on it?
or standing on current world & just /cityworld generate option on grass/plain biome etc

THANKS

[SlimeDog]

Firstly, there is no reason to expect that new CityWorld generated chunks would align with existing chunk borders in your world. In fact, it is extremely unlikely, since CityWorld is a flat environment at Y=64. If you chose to proceed anyway, the following might be helpful. Of course, all of this should be executed on a test server, to ensure you get what you want.

To begin, it is impossible to answer the question accurately, since you don't mention versions of Minecraft and the relevant plugins. Helpful information would be

/version
/version CityWorld
version of your world manager (Multiverse-Core or MultiWorld or ???)

In-game or at the console, you could try

/help cityworld

which would guide you to

/help citychunk

However, /citychunk regen fails on Spigot or Paper 1.16.4, since it hasn't been updated to recognize the new chunk format. This is true even for the various forks of which I am aware.

Another possibility is to use WorldEdit //regen. However, that will also fail on Spigot or Paper 1.16.4, for the same reason.

Having said that, you could always stop the server, delete the region files you want to replace, and let the chunks regenerate. But the results are unlikely to satisfy, for the reasons cited above.