High level hunting quality.

[g1real]

I think in this case there isn't a factor chance, but something different.

For example, all high quality leather pieces turn in one of for example - 45 QL, and three 37 QL.

Maybe there's something going wrong with the conversion?

[XkrikX]

Ah I see, I've finally figured it out.
So let's take an for example an imaginary "Ballista Arrow" that requires 3 branches and 3 bones.

The branches are QL 10, 15, and 30. - Averaged to 20 - Weight 1
The bones are QL 12, 16, and 20. - Averaged to 16 - Weight 3
Tool: Axe - 20 QL
Skill values: Strength, Perception and Carpentry - 10 each, 3rd root of 10*10*10 is ... 10

((20*1 + 16*3) / 4 = 17
(17*4 + 20*1) / 5 = 17,6

(17.6 + 10) / 2 = 8.8, rounded up to 9 quality ballista arrows

And if:
Strength: 13
Perception: 23
Carpentry: 1
13*23*1 = 299
299^(1/3) = 6.69

(17.6 + 6.99) / 2 = 12.295, rounded down to 12 quality ballista arrows

I has figured it out! And to think that's probably a very easy formula.

Keh?