Talk:Armor penetration/@comment-25011289-20140620231110/@comment-24055932-20140621082911

Well, I can explain why the curve is weird :-D

Because any armor value seen lower as 0 gets reduced to 0, the damage increase is as high as the damage reduction the champion with his actual armor would have (btw: We're comparing the damage difference to the damage the champion would do before calculating in armor). With 41% arpen and 49.2 flat pen the highest armor value that gets reduced to 0 is 49.2/0.59 = 83.4 Armor.

After this value, the armor actually results in damage reduction, and because around 0 armor even low armor differences make a lot of difference in terms of damage reduction, the curve rapidly drops.

The percentual reductions btw are:

0.94 (masteries) * 0.75 (TBC) * 0.65 (LW) = 0,46, or in other words 54% ArPen, so I agree that the maximum value curve isn't right