Arelith

Description
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Steps to reproduce

Be a Hexblade with Hex of Duality feat

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Expected result
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Hex someone and give them damage vulnerability to positive and negative damage

Actual result
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Hex someone and don't give them damage vulnerability to positive and negative damage

Screenshot(s)
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Misc Notes
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Which Server(s)?
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All

Gaming Platform(s)?
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pc

For all three of the hex bugs you posted, what were the numbers you were working with?

What level hex? Level 30 with 18% or level 23 with 12%?

What damage are you checking, 4 from essence?

The vulns are relatively low % and might only add 1-2 damage, especially on smaller damage rolls.

For example, a 4 damage pos essence getting 12% vuln is only 0.48 more positive damage... And there is no rounding up in nwn/dnd.

I'm chiming in because I had a deep dive on hex vuln calcs last year, and there are a lot of confounders. Calcs ended up correct then.

27 and 30 hexblade.

Greater ruin didn't deal extra damage to the Hexed target. 7 positive damage ( 4 essence, 2 hypocrisy, 1 duality ) should've been one extra damage but it always dealt 7, same with 1d8 essence + elemental decay.

Hexblade/Weaponmaster dealt the same damage to Hex of Neglect target regardless of the physical vurn. I could test it again on live since -relevel is a thing.

That's not how nwn math works and its why I gave it a flat damage boost.

7 * 1.18 would be 8 after rounding down, which nwn always does, but we're not starting at 7 * 1.18. The engine math would be
Essence (4 * 1.18) = 4.72 = 4.
Damage increase effect from curse weapon (3 * 1.18) = 3.54 = 3.
4 + 3 = 7.

Also with things like gruin its hard to tell if its having an effect when the damage is so variable. Test with a spell that does flat damage.

If you really want to test this properly go on pgcc with someone and have them hex you and see if you get applied the damage immunity decrease effect on your character sheet. If that doesn't happen, then something's definitely wrong there, but I can't help beyond that as I left the team.