When it comes to cultural exposure, I often see that some innovation or another is being boosted due to some other culture with the same religion having it. But nowhere do I see a way to see which cultures are tied to which religions? And do these ever flip?

For example, as a cultural leader of a Hindu culture I have taken over a large swath of Muslim lands. Some of them are of a certain Muslim culture (Afghan) that is pretty underdeveloped at this point in history, but the only exposure boosts they get are from other neighboring Muslim cultures. If all the counties under that culture are converted to my faith will the Afghan culture itself flip from Muslim (and being exposed to other Muslim cultures and their innovations) to Hindu (and getting exposure from my cultural group)?

And if cultures can flip religions, at what point does it happen? 50% conversion? 75%? 100%?

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Lot of questions boiling around here, but the primary one seems to be: "How are culture and religion linked?"

And the short answer? They're not!

Every character and county in the game has both a Culture and a Religion. Neither of these are set in stone -- characters can convert to any religion with the appropriate piety cost (or that of their spouses, for free), and landed characters can adopt the culture of whatever their realm capital has.

The culture and religion of a county can be changed to match your characters via the council -- your realm priest (for Religious Conversions), and your steward (for Cultural Assimilations).

There is no threshold for effects on either of these -- both characters and counties only have a single religion or culture, and in the case of using your Councillors, all progress is lost if they switch to a different task.

Given the opinion malus for having differing religions / cultures, it's often in your best interests (or those of your vassals) to convert counties in your realm to match your own culture.

  • But they clearly are. I added a picture. The Afghan culture shares a religion with the Andalusian (southern Spain, under Muslim rule in 982 in my game). I suspect it might have something to do with the religion of the head of the culture, but in my case Afghan does not currently have a head. Maybe it's the last head?
    – Wjousts
    Oct 13 '20 at 20:55
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    Exposure is a different beast entirely. As far as I know, one innovation is selected for "exposure", and that does not change until the innovation is unlocked. The solution to your problem isn't to change the exposure, though -- it's to change the culture of your new territories to match your own, so you can use the innovations you've already unlocked. Oct 13 '20 at 22:33
  • You seem to be missing my point. There isn't a problem, and converting undeveloped regions is counter productive anyway because your research depends on your average development in regions with your culture. The point is that cultures have a religion, but it's not clear how that link is established and whether it ever changes.
    – Wjousts
    Oct 28 '20 at 17:28
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    Cultures do not have a religion. Ever. They are entirely independent. Two counties of the same culture can have entirely separate religions. Oct 29 '20 at 0:15
  • 1
    Read the text from the screenshot as, "At least one Andalusian county had the same religion as a county you controlled at the time the exposure was picked". The only time exposure changes is when it finishes and is recalculated. Oct 29 '20 at 2:15

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