Hallelujah! The Gods have answered my pray! hahaha Thank you very much Raze.
I should have asked for it before... I spent some days searching for it on the internet. And some hours trying to figure it out for my self. I'm glad I gave up, I would never have found it alone.
I found two wikis with the old formula: http://divinityoriginalsin.wiki.fextralife.com/Defenses and
http://divinity.wikia.com/wiki/Defenses_(Divinity:_Original_Sin).
And other wandering souls: https://steamcommunity.com/app/373420/discussions/0/451848855009582900/ and https://steamcommunity.com/app/373420/discussions/0/490124466467920809/ . I would put the formula on the forums, but I don't have a steam account.
Was the formula some sort of secret? Or was it publicated somewhere, with other similar formulas?
After playing other similar RPG's I found this pleasure, of really knowing what's happening behind the numbers. Anyways, it's a wonderful game. Congratulations for all the team.
I have no idea what "single precision floating point value" means. But the formula works!
This is a screenshot of the formula on my calculator, just to clarify it:
[Linked Image]