>>21234
If you want to use the AI generator, it costs 50 per world creation. I don't know for sure what the minimum is where it will still let you, but based on how the turn generation AIs work, I'd guess you need 26 credits available in order to generate a world. However, if you don't want to use the AI to generate the world for you, you can just take an existing world and delete all of its contents to replace it with your own. Does have the downside of not including fresh pictures, but that's a separate issue.