Magic find - how does it work?

  • #1
    Hi. I did a quick search for any topic on this and could't find what I was looking for, so here goes.
    How does magic find work?

    The way i currently understand it:

    Say i kill Azmodan with 0% mf and no NV.
    The game creates a table of loot that he drops, like: 1 t13 bow, 1 t10 armor, 1 t09 legs etc.
    Each of those have a % chance of beeing white, blue, yellow, legendary.
    Example:
    In the loot table is a helion crossbow. On azmodan it has a 50% chance of being white, 30 for blue etc.

    Should i have any magic find, it would increase the chance for blue, yellow, legend?
    Or am i way off?

    /Jakel
  • #2
    yes. The more MF you have + NV buffs the more chance you have to gain better items.
  • #3
    1st: www.giyf.com

    2nd: think of magic find improving the quality of items dropped. if you've got 100% mf on your gear and there is a 1% chance this boss drops a blue it will drop a blue with a 2% chance.
  • #4

    1st: www.giyf.com

    2nd: think of magic find improving the quality of items dropped. if you've got 100% mf on your gear and there is a 1% chance this boss drops a blue it will drop a blue with a 2% chance.

    I am well aware that magic find improves the chance of getting better quality items. What i wonder is how it is determined what items drop. Like is it a predefined loot table that has the quality of the predefined item types increased? Or is every item defined on 2 percent for blue and then random item type @ each drop? Or maybe something different..
  • #5
    Diablo is all about rolling dices. Here's an example:

    Let's say a boss can drop a total of 6 items and lets assume the chances are as following:

    -10% of it being white
    -80% of it being magic (blue)
    -5% of it being rare
    -5% of it being legendary

    The game will now roll backwards:
    will it be legendary? (5% probability)
    if no: will it be rare? (5% probability)
    if no: will it be magic? (80% probability)

    Let's assume you have 100% MF, the probabilities will be changed:

    -160% of it being magic (blue) guaranteed
    -10% of it being rare
    -10% of it being legendary

    And thats for every possible drop. With 5 stacks of NV you will get 2 guaranteed rare drops on top of the normal loot table. The count of items that can possibly be dropped is predetermined and fixed.
  • #6
    @ Impala - Ty, the answer i was looking for :-)
  • #7
    Actually its similar to D2 in the sense a boss (or mob) will have a loot table to pull from. Lets say it pulls ilvl61 gloves. Since it is a boss, the base quality is 'magic' (or with 5 NV, the first 2 are guaranteed to be rare base). There is then a % that this item can be rare, so lets just call it 1% for the sake of math. This item will pick a random number 1-100, if it is a 1, boom you have a rare. With Magic find, that % is directly affected so, as previously stated, 100% mf on a 1% chance is now 2%. And of course, I'm certain the servers aren't "rolling" 1-100, but its a simplified way to express what is going on. This continues on for legendaries as well. magic > rare > legendary/set is the progress of upgrade. So if there is a 1% chance for the item to be rare and a 1% chance for it to then become legendary, then the base chance that the magic item will be legendary is 1% * 1% or 0.01%. Conversely with 100% mf, the chance would be 2% * 2% or .04%. So then you see magic find affects getting set and legendary items more than rares.. however that is on a purely % basis. A difference of .03% will matter almost nothing to you, a small fraction of the 'pool', but is significant on the scale of every single player. These are also random numbers I chose and not actual values.. and also on the assumption that an item can be a legendary/set. Otherwise it stops at rare.
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