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This is controlled by INBRED_DIVINE_BLOOD_TRAIT_CHANCE_FACTOR in aģThere is an additional effect LUNATIC_DIVINE_BLOOD_TRAIT_CHANCE_FACTOR which I think has no effect since lunatic does not have a base chance of appearing at random or inheritable.Home Discussions Workshop Market Broadcasts. So in general it's a good idea, but you want to have concubines around to make up for the fertility issue.ġThis is controlled by DIVINE_BLOOD_FERTILITY_MULT in aĢThe exact mechanics behind the chance of having the inbred trait show up out of the blue (not inherited, which is 25%) are unknown, unlike other congenital traits which have a moddable fixed chance of appearing, but it is generally assumed that close marriages have a higher chance. One more thing that probably doesn't have an actual effect 3.50/100/200/300 piety on marriage depending on rank.+10 opinion for vassals, +25 for vassal priests.20% of base chance of having the inbred trait pop up 2.
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The Zoroastrian "divine" marriage have these effects in vanilla: Thus concubines and fresh blood are definitely recommended. However, if the second generation brings in fresh blood, and has the third generation (cousins) pair up, things are back down to a 6% chance. However, the second generation brother/sister pairing would have a whopping 88% chance. Running the numbers from the source, a first generation "clean" brother/sister pairing has a 10% chance of inbred or lunatic in a child. This obviously changes the calculus, however, it turns out unless there's sustained incest going on, inbred risk isn't that high. This is not used in the vanilla game, but is available for mods.Īdditionally, lunatic is potentially an outcome of incest at the same base rate as inbred (before potential modifiers) The second is applied to dynasties, and carries the other mechanics discussed below.The first is applied to a religion, and only carries an opinion and piety bonus, e.g.It turns out there are two separate, different mechanics both labeled divine marriage in the game.
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