How resistance are calculated?

I have 342 inteligence, when hover on it it says +17%all resestance, amulet +26% all res, a ring with +35% fire res → in char screen my fire res is displayed as 37.6%, how? of course when hover it is says reduce fire damage by 18.8%(this I understand res in this game apply to half of the damage only).

I know the diminishing stuff, e.g. 50% res on an item + 50% res an another item would make 75% res total, but calculating based on that still not figure out how in D4 is calculated.

p.s.: I know that resistance are not a good defensive stat now, but I am just courios about the math behind

Say you have two 40% fire resistance sources, one gives 40% resistance, the other, 40% of the remaining to 60% not covered by the first (24% extra resistance). They stack multiplicatively.

Next thing, if you are on T3, 20% goes out, on T4 40%, this is at the end of the calculation. No matter what, you can only get near 60% on any res, at most. On T4 the first example, you go from 64% resistances to 38.4%.

Then, only half applies, to half of the damage. So a resistance-heavy character would have 30% resistance at most, to 50% of the non-physical damage.

They are sheet, yeah. Not worth the slot, specially when armor is so OP, and all the other forms of damage reduction affect all damage types.

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And it’s going to take until season 2 to resolve it supposedly - another half baked system that wasn’t tested.

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Because of the resistance penalties coupled with resistances being multiplicative it basically puts a soft cap on resistances. The first 25% are easy to get but it’s a complete waste to keep stacking resistances after that. To get from 25% all res to 50% all res you’d need more than +150 all res. Resistance is the worst stat you can possibly get on an item because of how it works in this game.

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Say you have 200% fire resistance on an item, according to my calculations it should give you as much resistance as about 20 armor.

armor protects against physical damage and resistances against elemental damage. But armor is SIGNIFICANTLY better, that much is true.
edit: I was wrong about armor only protecting against physical

Resistance is currently a bugged stat and offers pretty much nothing unfortunately

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I didn’t know it was bugged, I just thought the way it was designed made it pretty worthless. Maybe I’m wrong.

How resistances are calculated? Probably with a rock and shards of broken glass

You cannot get more than 60% from a single source I think. Anyways it stacks multiplicatively, against the value not covered to 100%, then the resulting value goes to 60% of that.

Another example, three 50% ice resistances would be: 50% + 25% (50% of the 50% remaining) + 12.5% (50% of the 25% still not covered). Then on T4, multiply it with 0.6 (40% ignored by monsters, also shown on your character sheet). To a grand total of 52.5% ice resistance. Then only 26.5% is effective against 50% of the ice damage.

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How a core mechanic of the game can be bugged ?It’s not serious

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This explains it pretty well, skip to about the 2:00 mark

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This is how I have assumed it works as well which would explain why it’s so bad.

Is not bugged. Works as intended, just happens is garbage, specially when with some effort, you can cover 80-85% of the physical damage, and 40-45% of the 50% of the non-physical damage, with armor.

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Wait, armor works for non physical damage? That kind of negates the need for resistances entirely doesn’t it? Specially considering how bad it is.

Yep, pretty much especially considering how useless resistance is. This is one of the reasons Sorcs are so bad right now.

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I kind of just assumed armor was for physical damage only, that would have made the most sense to me. Well I stand corrected. Also thanks for the video!

No problem, Kripp is pretty good when it comes to getting into game mechanics.

I also don’t understand why half of armor applies to elemental resistance. I guess they wanted tanky classes to feel tanky but it kinda negates the usefulness of rolling % res on gear.

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You can check it out on the character sheet. Armor contribution: cover 50% of the damage, with 50% of its effectiveness.

If you have 80% effectivenes from armor, and 50% from ice resistance, means:

if you take 1000 damage, 500 is covered by armor, at half the effectiveness (40% damage reduction), the other 500 is covered by half of your ice resistance (25% DR to that).

Hope it helps.

Would have made much more sense to me if armor applied only to physical and have resistances actually being viable and for those to cover the elemental part.

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