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I've already posted this in another thread, but I'm afraid it might get lost, and other people might be wondering about it. Here's an explanation of how the new culture system works:
Culture is completely provincial. So every settlement in a province contributes to this province's culture. If a province is divided between several factions, the provincial culture still is the same for ALL settlements of ALL factions in that province. With that we want to simulate culture spreading across borders (at least within a province).
In each province, there is a cultural equilibrium towards which the culture always tends. For example, if a province has 6 Latin cultural influence and 4 Hellenic cultural influence, the equilibrium would be 60% Latin and 40% Hellenic. Another example: With 4 Celtic and 2 Germanic influence, the equilibrium would be at 66.6% Celtic and 33.3% Germanic.
Now the current cultural breakdown will shift always towards the equilibrium. For example, if the equilibrium would be at 60% Latin and 40% Hellenic (6 Latin & 4 Hellenic influence), but the current cultural breakdown is 70% Latin and 30% Hellenic, then Latin would decrease and Hellenic would increase (even though Latin has a higher cultural influence than Hellenic), until the equilibrium is reached. The further a culture's percentage is from its desired equilibrium percentage, the bigger the change per turn is. This means that when a new culture enters a province, it will grow quickly at the beginning and then slow down when it gets closer to its equilibrium.
As soon as the cultural influence of any culture in a province changes (for example, because a building is constructed, or a dignitary enters the province), the equilibrium values are updated and the cultures will shift towards this new equilibrium.
A province's "local traditions" are just another cultural influence factor that is always there, which cannot be changed. Most provinces have a sum of 4 local traditions influence points (shared between cultures), while some "cultural capitals" such as Rome or Alexandria have stronger local traditions. Local traditions also mean that provinces cannot be converted 100% to a foreign culture -- added realism.
I hope I could help you understand the new system. If you think there's a bug, we would need the following information from you:
- Current cultural breakdown of the province for each culture
- Change per turn for each culture in the province
- Total cultural influence for each culture in the province
Thanks for posting, and hopefully have fun with Caesar in Gaul!