Corruption (and how to get rid of it)

[kaannath.ttv]

I'm curious, is corruption tied to the campaign difficulty? I can't seem to bring it down any lower as of now, even with all the buildings and agents available.

[Elitewrecker PT]

Difficulty has no effect on corruption.
Note that certain provinces have inherent corruption that you can't get rid of.
Do you know how corruption trend works?

[zefyris]

Always mouse over the corruption value to see the trend as well as the type of source (local populace, building, osmosis, characters, etc).
WIth these infos in hand, post them here (or simple screenshot of them) so that we can explain the parts you don't understand.

It'll be better than trying shots in the dark to guess in which case you are by asking you tons of questions.

[Humble]

There is always building to counter type of corruption, lord and hero that had some skill to lower those, but I don't put skill point into, so I use a building and get rid of whatever cause those corruption like army raiding on your land, ect. but there is some land you can't get 100% like waste land cold always production chao corruption or wood elf had those type, or vampire count's homeland had those vampire corruption, ect.

[MrSoul]

A lot of factors can influence corruption, from "local population" to of course, the main chaos event. On stage one applies global +1 to chaos corruption map wide, on stage two starts at +2, believe more settlements chaos razes the higher this corruption rises as well(up to +3, 24 settlements razes last campaign before hit Age of Peace last night, unsure what happens if you let that get carried away tho and I've noticed Saarth locked in some kind of chaos ritual up north so I imagine sets him loose if you do, Archie never put in enough effort against empire AI tho still to make it happen xD).

Corruption can be very difficult to deal with as well as, like religion in Attila(like original chaos invasion script, it is literally same mechanic ported over to this game and renamed), you simply cannot eradicate an entire...influence of certain corruption, ie if local populace is like 2 on a province, even if jack out buildings, have a hero with 3 levels in their anti corruption ability and a lord helps to, with 2 local populace you'll likely only ever get up to like 92-95 untainted, which is fine don't have penalties for public order at that point, but never be able to "remove all the corruption". (makes sense too, even well meaning people in High Elf society could be agents of chaos and helping to spread the warp without knowing it, in fact usually how it starts in all books etc. road to hell is paved with yadda yadda. If want to know more read up on what Teclis does during End Times stories, quite funny actually a perfect example of how insidious and twisted chaos "corruption" can be.)

If suffering during height of invasion too, just gotta deal with it, focus on countering rebellions and main hordes, once Age of Peace hits it removes global effect which drastically reduces chaos even in provinces where local populace is effecting it.

Tools at your disposal for what it is worth, all I can think of too if missed anything someone please add

-Technologies
-Buildings(like shrines of khaine for dark elves)
-Certain hero classes
-Certain lords
-Some items can equip (tho it is rare, and typically legends like Morathi's weapons)

Some factions too just suffer more form it, think like Empire gets a +1 from start, where as DE have to research those base and rely alot more on Hags and shrines to counter it, even then at some point I've just learned to live with it in campaigns, especially there when you have Morathi spreading it seemingly just to spite her son lol

[kaannath.ttv]

Originally posted by Elitewrecker PT:

Difficulty has no effect on corruption.
Note that certain provinces have inherent corruption that you can't get rid of.
Do you know how corruption trend works?

No, I would like to know more about this. Most guides out there only refer to the different corruptions, but I feel the game does a very poor job at explaining it.

Also in TW:W1 you could (to my knowledge) remove it as much as it wouldn't leave a visible trace, like from Sylvania. There would always be like 2% or something, but nothing that would show up near the settlement, which is my main gripe.

Originally posted by zefyris:

Always mouse over the corruption value to see the trend as well as the type of source (local populace, building, osmosis, characters, etc).
WIth these infos in hand, post them here (or simple screenshot of them) so that we can explain the parts you don't understand.

It'll be better than trying shots in the dark to guess in which case you are by asking you tons of questions.

Sorry I didn't think of adding a screenshot. The location I was referring to was Lybaras and Lahmia.

[Elitewrecker PT]

Ok, it works exactly like in WH1 really.
The "final" corruption values (after giving enough time to trend to them) are dictated by the combined sources of each corruption divided by the total distribution of all corruption/untainted sources in that province.

So, if we take Sylvania for example, with an innate vampiric corruption of 2 (or 3, something like that). Without any other source of corruption it will trend to 100%, because it's 3 / 3 = 1
If you had 2 points of untainted (be it from a building or a hero presence) it becomes 3 / 5 vampiric, and 2/5 untainted, so the corruption values will trend to 60% vampiric, 40% untainted. The speed at which the corruption changes depends on how far it is from the final values.

For a more "extreme" example. Imagine if we have a Skaven settlement in an innately vampiric province, with chaos/beastmen armies and dwarf runesmiths wandering around.
The "final" values are each different corruption/untainted sources of skaven, vampiric, chaos and untainted divided by the total sum of all. So if we have like 10 points of chaos corruption from the chaos/beastmen armies, 5 points of skaven corruption from the settlement, 3 of the innate local populace vampiric corruption, and 2 untainted cleansing from the runesmith, that would be a total influence of 20 points. Which will, eventually, lead to a total of 50% chaos corruption, 25% skaven corruption, 15% vampiric and 10% untainted.

On a more theoretical experiment: If you wanted to completely nullify a local populace, you'd need to reduce it's final value to less than 0.5%, so to have a 0% vampiric corruption in Sylvania, assuming a 3 local populace, you'd need around 620-680 total points of other corruptions (depending on if it rounds up at 0.45% or 0.50%. While you'd "only" need around 200-210 points to get 1%. Or ~130 for 2%.

[KOS]

Burn the heretic !