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DF2014 Talk:Skill
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Legendary+5
The logic for determining item quality changed a while ago (back in version 0.40, I think), and I believe the significance of Legendary+5 has been largely lost in the process. A few mechanisms still use it (such as Farming/Herbalism yields), but item quality seems to use a completely different formula now. Further research is needed. --Quietust (talk) 13:28, 6 May 2020 (UTC)
Update: I believe I've figured out the logic used for determining Item Quality from jobs:
- Find the effective skill level (i.e. Novice=1, Legendary=15), uncapped, with status penalties applied (see article)
- Roll for item quality "points":
trandom(11) + trandom(1 + (level * 5) / 2) + trandom(1 + (level * 5) / 2)
(note:trandom(N)
returns a number from 0 to N-1) - Add points for physical attributes:
(trandom(phys_attr1 + 1) / 100) + (trandom(phys_attr2 + 1) / 250) + (trandom(phys_attr3 + 1) / 250)
(for whichever attributes are actually associated with the skill) - Add points for mental attributes:
(trandom(ment_attr1 + 1) / 100) + (trandom(ment_attr2 + 1) / 250) + (trandom(ment_attr3 + 1) / 250)
(see above) - Adjust points based on focus:
points = (points * current_focus) / undistracted_focus
(field names from "unit_personality" struct in df-structures) - Apply status penalties again, this time to the "points" (this might be a bug?)
- If you have a Curse (or Blessing) with a Luck modifier, apply it to the points:
points = (points * luck_mul_percent) / 100
- Add 10 points if the item being produced matches an Item preference on the maker
- Add 10 points if the item being produced matches a Material preference on the maker
- Feed the points into the following formula:
- 0-21 - base quality
- 22-29 - Well-crafted
- 30-34 - Fine
- 35-44 - Superior
- 45-54 - Exceptional
- 55+ and a 1/3 chance - Masterwork
--Quietust (talk) 02:42, 5 August 2021 (UTC)
Skill Rust
This section suggests there is no effect other than the rusty skill description in fortress mode. By observation a rusty skill might effect quality of produced items and eventually the dwarf will loose experiece and/or skill level.