Tau resistance calculation bug

[Blyker]

The calculation of the Tau resistance from Umbral Intensify, Fiber and Vitality is wrong

1 Equipped mod
Expected =11%
Actual = 11%

2 Equipped mods
Expected -> 2x13.8 = 27.6%
Actual = 25.6%

3 Equipped mods
Expected -> 3x19.3 = 57.9%
Actual = 47.3%

There might be some rounding on the numbers but that should matter 0.1-0.15%

[Verreater]

Not a bug, its multiplicative now and DE mentioned this in patch notes.

Quote

Update 30.5 (2021-07-06)

Damage Resistance Mod Math Changes:

The following changes occurred due to the following scenario being shared:

A player reported that combining Umbral Mods + Adaptation + Lightning Rod on any Warframe made them fully immune to all damage from the Hydrolyst Eidolon.

Prior to this discovery, we already made sure we couldn’t reach 100% Damage Resistance because that would just be excessive in all cases. You can see this in action when we capped the ‘In Air’ Damage Resistance Mods. Even though the Mods theoretically could reach 100% Damage Resistance, there is a hard cap at 90%.

In response and to avoid future oversights, we have changed the way Damage Resistance works. It now works on ‘Damage Remaining’ instead of having all the Modifiers combined and operating at once.

Example:
Consider the case of:
4x 25% Damage Resistance Mods

WAS: (25% + 25% + 25% + 25%) = 100% Damage Reduction

NEW: Take 25% Less Damage = Only take 75% Damage

0.75 x 0.75 x 0.75 x 0.75 = 31.5% damage taken AKA 68.5% damage reduction

 

So with each mod providing 19.25% damage reduction = 80.75% damage taken = 0.8075*0.8075*0.8075 = 52.65% damage taken = 47.35% damage reduction.

[Blyker]

That sounds good thanks i had missed that!