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% Pen and Flat Pen

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Mitey Oosik

Senior Member

12-04-2012

Would someone mind telling me the difference, either through items or champs or however it works? thanks.


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CorruptDictator

Senior Member

12-04-2012

In the new season, % is applied fist (so, for example, 35% pen would bring 100 armor down to 65 armor) followed by flat penetration (so if you had the 35% and an addition 15 flat, total armor of your target would be down to 50 from the base 100 we started with) against your attacks. Neither % or flat can bring an armor value below 0 (at 0 you are doing essentially true damage).


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Mitey Oosik

Senior Member

12-04-2012

where does flat pen come from? I see % pen come from items.


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CorruptDictator

Senior Member

12-04-2012

Flat comes from both some items and runes.


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notanxj9smurf

Member

12-04-2012

flat comes mainly from the item brutalizer and the items in builds into.

also runes.


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Ur little sister

Senior Member

12-04-2012

All pen and reduction comes from items, masteries and skills.

Old order of calculation:
- flat reduction
- % reduction
- flat pen
- % pen

New order: flat pen and % pen got switched around.

Imagine having 10% pen and 50 flat pen against a 100 armor target.
The old patch would first calculate the flat pen, thus leaving him with 50 armor, then the %, leaving him with 45 armor to reduce your physical damage.
New patch first calculates the % pen, leaving him with 90 armor, then the flat, leaving him with 40 armor to reduce your physical damage.

The more % pen you have, the bigger this difference becomes. This was holding AD casters back, as items they like (black cleaver, youmuu) have flat pen. However, lategame, these items are useless because they NEED Last Whisper, which gives a ton of % pen, and thus reduces the effectiveness of the flat pen you already had.


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