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Lt. Commander
Join Date: Dec 2007
Posts: 120
# 4
07-25-2011, 02:44 PM
Quote:
 Originally Posted by Summit no it just increases shield regen. I find it actually helps a lot even with my covarient shields
This is incorrect...

Q: How do shield resistances (or Shield Damage Reduction) work?
Recently the discussion came up on how Shield Resistances work and stack. Some tests and a clarification by snix provided the answer.
Shield resistance are described in percentages, e.g. by how much the damage your shields take are reduced. Shield Resistances stack multiplicative. If you have value of n % as shield resistance, the damage you receive is multiplied by 1 - (n / 100). For example, if you have 25 % Shield Resistance, you have 1 - (25/100) = 0.75 as damage mutlpilier. If you have 2 shield resistance sources, you multiply these values. So, if you have 15 % shield resistance from shield power and 20 % from a shield resistance granting power, the effective value is 0.85 * 0.8 = 0.68 or 32 % damage reduction. There is also a 75 % cap for the final value of your resistance.
Note on terminology: Since Armor and Shield have different formuals on stacking and how the yare applied overall, I and others prefer to refer to shield resistance as "Shield Damage Reduction" (SDR).