Mount & Blade II: Bannerlord

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Marnah93 and Philozoraptor

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Mod articles

  • Ranged weapon and armor performance in Realistic Battle mod

    The core of the armor penetration calculation comes from The Knight and the Blast Furnace: A History of the Metallurgy by Alan Williams. However there are some gaps in it since it primarely focuses on plate armor. So gaps were filled with Youtube experimental evidence and historical sources. For example we are assuming arrows / bolts are not greased in RBM (greased arrows seem to have "effectively 20 more joules" in comparison to non greased ones when we take into consideration results from Knight and the Blast Furnace). However the videos about loss of energy of arrows at range or penetration of light-medium shields are very educational in my opinion. Also videos with speed meter and bows used with multiple arrows and multiple weights (specifically Joe Gibs videos) are pretty good sampl...

  • How armor works in RBM and how to make armor patch for RBM (lot of numbers)

    In RBM, 1 point of armor represents ability to protect from 2 joules delivered by bodkin arrow or bolt (ungreased and unhardened). So average mail with padding beneath will have some 35 armor which will be able to stop 70 joules (damage) form bodkin (piercing) arrow. This calculation is also used for partial penetration of thrusts (and couches). For full penetration calculation with thrust its roughly 2.5-3 joules per point of armor. For cutting (and blunt) attacks its 4 joules per point of armor. Portion of absorbed damage is then transformed into blunt trauma depending on the weapon type. For example cuts with daggers and swords have lowest blunt trauma while maces got the highest blunt trauma.

    Numbers time:

    Civilian cloth in RBM has in general 5-12 armor.
    M...

  • Throwing weapons in Realistic Battle mod

    All thrown weapons have kinetic energy based damage. When weapon is thrown energy of the throw is recalculated into throwing speed based on the weight of the thrown weapon. Initial throwing weapon is capped at 25 m / s since this speed seems to be limit of human hand based on the data from modern olympic throw but other modern disciplines as well. calculated speed is then artificially increased by 10 m / s and reduced on impact in the calculation by 10 m / s. This increase in speed is done to help AI throw at larger distance without artificially increasing their damage.

    Energy of throw is calculated like this: 60 + skill * 0.8. This means that with 0 skill your throw has potential energy of 60 joules, at 100 skill its 140 joules and at 200 skill its 220 joules (which is compara...

  • How melee weapons work in Realistic Battle mod

    Every melee attack has certain base damage, skill based bonus damage and also damage from the weapon. 
    General logic is that some weapons such as swords require more skill, so they start with lower damage and scale better with skill, while weapons like maces and spears are easier to use and thus more efficient in the beginning but they scale less with skill.

    daggers / throwing knives / swords:
    cut: 40 base damage + (skill * 0.53) + weapon cut damage
    pierce: 50 base damage + (skill * 0.46) + (weapon pierce damage * 10(thrust modifier) * 0.2)

    two handed swords:
    cut: (40 base damage + (skill * 0.53)) * 1.3 + weapon cut damage
    pierce: (50 base damage + (skill * 0.46) + (weapon pierce damage * 10(thrust modifier) * 0.2)) * ...

  • Couched lances in Realistic Battle Mod

    Damage of couched lances with RBM combat module equals joules of kinetic energy of such attack. According to following scientific paper, couched lances without lance rest (gadget on plate armor) can achieve up to 230 joules of KE, this is combination of ballistic properties of the lance and skill of the rider the can put some weight into the lance. This added energy seems to be in ballpark of up to 110 joules which in turn is in ballpark of 2.5 kilograms of added weight via the skill of the rider. With lance rest impact energy can go over 250 joules, however at 250-260 joules lances started to break. Tested lances were made of solid pine wood (presumably Scots Pine, since article was of British origin). Lances were relatively thin and long (details in the article), comparable to lances on ...