@Koshling,
Savegame as requested.
Something else that I noticed when I went into WB, Those AI with FB seem to accrue Culture at a faster rate than the AI and me with Republic or better.
This poses the question, Does Afforess have two or more separate Culture rates in place?
Some of the AI cities with FB had 10s of thousands of Culture points will my cities only had hundreds or a few thousand even though I have many Culture buildings and Wonders.
And the Hittite has Republic but yet the city I took acts like he has FB too.
JosEPh
Joesph, I've taken a look at this but it turns out it's not really a good test case for fixed border changes. Reason is that almost none of your issues here are fixed-border issues (some WOULD be if there weren't pure culture issues that mean it doesn't matter anyway).
There are two areas of conflict I looked at where you have isolated cities recently captured, which I'll discuss below.
1) In the area around Kalakh, the original owner (Assyrian) retains control of a ring around your captured city. He does have fixed borders (which would indeed cause this) but in this case it would happen anyway! The reason is that the Assyrian city Arbel, to the south of Kalakh, has Influential culture. That gives it a culture range of 7. The furthest point from it in the ring around your captured city is the corner point NW of Kalakh. If you hover there you'll see that Assyrian is still the dominant culture there. Because this tile is also within the cultural influence of an Asyrian city (it's within 7 of Arbel) that means that the Assyrians get to keep it ANYWAY, regardless of fixed borders. If Arbel had two steps less cultural power then the fixed borders would indeed make the difference with reagrd to that tile, but as it is no ownership would change at all here even if the Assyrians did not have fixed borders. You are simply being out-cultured here (presumably largely because this is the Assyrian heartlands, and they have been builidng up culture there all game long). To counteract this you need to attack the high culture cities first really.
2) In the area around Kanesh a similar thing is happening. Here the opponent does not have fixed borders, but does have cultural dominance (Hattusas is influential and Akuwa is refined, either one of which would suffice to isolate Kanesh.
Culture rate depends only on buildings and civics - there are no separate rates for the AI as such. If you can point me at a specific example where you think the rate is anomolously high on that save game I'll take a look. However, I suspect this is just down to difficulty level since the AI always plays at noble (so can build stuff cheaper than the player at a higher difficukty level, and hence likely builds up cultural buildings faster).
Net of all this is:
i) This is not really a good illustration of a fixed borders issue. However, I still believe there IS a fixed border issue, but I'm still in need of a good test case before I try to change the way it operates.
ii) One could argue that there are issues with the way cultural tile ownership works, irrespective of fixed borders. For example, maybe capturing a city should cause a large local influence swing, in the same way that wining battles does, but substantially larger (and city size and/or culture level dependent). That would probably cause a lot more tiles near your border (and therefore likely bridging to the captured area) to flip, at least in non-fixed-border cases (and we could then work on the fixed border cases also).
Having realised this isn't simply a fixed borders issue (at least in your example), I'm not proposing to make any immediate changes . However I am ready to do so if someone can provide me with a good example of a fixed borders issue in the form of a save game, and (in the case of the non-fixed-borders problem) am also happy to add city-capture influence if people think I should (but that needs a wider sample of opinion first).
Feedback (most) welcome...