Quote (Alone @ Jan 4 2019 07:12am)

Depends on area level but racks can drop uniques in general

Quote (Scientifix @ Jan 4 2019 07:28am)

nm meph racks dropped tits on my java

Quote (15bucks @ 4 Jan 2019 11:27)

Rack beside NM meph. Already seen at least 6 white serpentskins.
Trying to find out what's makng it change some times. No monsters and my summons normally makes it drop but then got a fetish head as my last run and not sure what I done different

Quote (Alone @ Jan 4 2019 08:55am)

Is this sp or btnet

Quote (15bucks @ 4 Jan 2019 13:16)

Sp

Quote

UniqueBaseChance = 240
UniqueDivisor = 3
UniqueMin = 6400
ilvl of the rack = 79
qlvl of Gilded Shields = 51

UniqueChance = (240 - ((79 - 51) / 3)) * 128
UniqueChance = (240 - 9) * 128 = 29568 (I presume the game rounds [truncates?] to integers as it usually does)
Skip the MF calculations.
Check against UniqueMin, 29568 is not smaller than 6400, continue.
I also presume that racks don't have a QualityFactor, as chests don't seem to have one either (looking at TreasureClassEx.txt).

So the chance to get an unique Gilded Shield, when a Gilded Shield drops:
128/29568 or 1/231

The same calculations for set (or failed set in this case):
128/14208 or 1/111

And since the game has to fail the unique chance first:
230/231* 1/111 ~ 0.897%

Quote (Alone @ Jan 4 2019 09:39am)

In 1.07 you could affect the item drop from racks depending on the way you approach the rack itself (route and character movement directions).
It was changed tho and doesn't work anymore.
However, Racks do tend to drop few certain items more than other items, in your case Serpentskin Armor.
So try to keep running that rack without rerolling the map, or you might lose it and get another rack that will drop any other item more occasionally.

This is the math done for Gilded Shield drops in Lower Kurast:




Try to use it as an example to calculate your own Vipermagi drop chances