Although there are different types of archetypes for autogen buildings for different continent in the game, but I would like to know whether it is possible to make a custom archetype for an area, and what are the “ingredients” for this if it is possible, thanks in advance
As far as I know you can only put individual (stock and your own custom) buildings, not replace the AI group tags, or change archetype buildings choice. But maybe it would be possible to put a Polygon, replace the existing scenery and then populate it again, using a completely different set of archetypes, with a certain density… like trees… But then, you would have to do not only buildings, also redraw roads etc. It may be easier, to just replace buildings where you want them replaced. Either way, it is a lot of work.