====== Treasure probability curves (Twildish) ======
With weighted treasure randomizations (''Tpro'' and ''Twildish''), the contents of treasure chests and quest rewards are selected based on a weighted probability, which differs according to their location.
When assigning a random reward item based on a curve:
* The randomizer selects an item tier at random, based on the weighting.
* A random item is then selected from the options within that tier. (See [[item stats tables]] for item tier information.)
''Twildish'' applies a transformation to the ''Tpro'' weights in order to boost item quality, as follows:
* new tier 1 weight = (old tier 1) * 7/8
* new tier 2 weight = (old tier 1) * 1/8 + (old tier 2) * 6/8
* new tier 3 weight = (old tier 2) * 2/8 + (old tier 3) * 5/8
* new tier 4 weight = (old tier 3) * 3/8 + (old tier 4) * 4/8
* new tier 5 weight = (old tier 4) * 4/8 + (old tier 5) * 3/8
* new tier 6 weight = (old tier 5) * 5/8 + (old tier 6) * 2/8
* new tier 7 weight = (old tier 6) * 6/8 + (old tier 7) * 1/8
* new tier 8 weight = (old tier 7) * 7/8 + (old tier 8)
The following are the approximate weights for ''Twildish'', calculated based on the formulas above. The ''Tpro'' weights are available [[treasure_probability_curves|here]].
//Note that ''Tmaxtier:6'' will prevent tier 7+ items from appearing in untrapped chests. If a chest would contain a tier 7+ item, instead its tier is randomly re-selected.//
===== Untrapped chests =====
Each untrapped chest receives its item based on the area where the chest is found.
^ Area ^ Tier 1 ^ Tier 2 ^ Tier 3 ^ Tier 4 ^ Tier 5 ^ Tier 6 ^ Tier 7 ^ Tier 8 ^
| Baron Town | 35 | 20 | 17.50 | 16.50 | 9.75 | 1.25 | 0 | 0 |
| Baron Town Weapon/Armor Shop | 8.75 | 8.75 | 30.63 | 29.38 | 16.25 | 6.25 | 0 | 0 |
| Chocobo Forests | 8.75 | 16.25 | 23.75 | 21.25 | 16.75 | 11.75 | 1.50 | 0 |
| Mist Cave | 0 | 0 | 25 | 35 | 26.75 | 11.75 | 1.50 | 0 |
| Village Mist | 17.50 | 25 | 26.25 | 20.25 | 9.75 | 1.25 | 0 | 0 |
| Kaipo | 8.75 | 23.75 | 32.50 | 24 | 9.75 | 1.25 | 0 | 0 |
| Watery Pass | 8.75 | 16.25 | 23.75 | 23.75 | 17.38 | 8.63 | 1.50 | 0 |
| Waterfall/Lake | 0 | 0 | 25 | 35 | 26.75 | 11.75 | 1.50 | 0 |
| Damcyan | 35 | 20 | 17.50 | 16.50 | 9.75 | 1.25 | 0 | 0 |
| Antlion Cave | 26.25 | 18.75 | 17.50 | 20 | 14.38 | 3.13 | 0 | 0 |
| Mount Hobs | 8.75 | 8.75 | 30.63 | 29.38 | 16.25 | 6.25 | 0 | 0 |
| Fabul | 17.50 | 25 | 26.25 | 20.25 | 9.75 | 1.25 | 0 | 0 |
| Mount Ordeals | 8.75 | 8.75 | 30.63 | 29.38 | 16.25 | 6.25 | 0 | 0 |
| Sewer | 8.75 | 8.75 | 30.63 | 29.38 | 16.25 | 6.25 | 0 | 0 |
| Baron Castle | 8.75 | 16.25 | 23.75 | 23.75 | 18.13 | 9.38 | 0 | 0 |
| Agart | 8.75 | 23.75 | 32.50 | 24 | 9.75 | 1.25 | 0 | 0 |
| Silvera | 8.75 | 23.75 | 32.50 | 24 | 9.75 | 1.25 | 0 | 0 |
| Toroia Town | 8.75 | 23.75 | 32.50 | 24 | 9.75 | 1.25 | 0 | 0 |
| Toroia Castle | 8.75 | 23.75 | 29.38 | 23.63 | 12 | 2.50 | 0 | 0 |
| Toroia Castle Treasury | 0 | 6 | 14.50 | 17.50 | 25 | 27.50 | 7.63 | 1.88 |
| Cave Magnes | 0 | 15 | 30 | 30 | 18.75 | 6.25 | 0 | 0 |
| Tower of Zot | 8.75 | 8.75 | 24.38 | 28.13 | 20.63 | 9.38 | 0 | 0 |
| Dwarf Castle | 8.75 | 20 | 28.13 | 27.13 | 14.75 | 1.25 | 0 | 0 |
| Lower Bab-il | 8.75 | 8.75 | 21.25 | 26.25 | 22.50 | 12.50 | 0 | 0 |
| Eblan | 8.75 | 8.75 | 18.13 | 24.38 | 23.63 | 14.88 | 1.50 | 0 |
| Cave Eblan | 8.75 | 8.75 | 27.50 | 27.50 | 18.13 | 9.38 | 0 | 0 |
| Upper Bab-il | 8.75 | 8.75 | 24.38 | 28.13 | 20.63 | 9.38 | 0 | 0 |
| Upper Bab-il (after fall) | 8.75 | 8.75 | 24.38 | 28.13 | 20.63 | 9.38 | 0 | 0 |
| Tomra | 8.75 | 16.25 | 30 | 29 | 14.75 | 1.25 | 0 | 0 |
| Smithy House | 8.75 | 8.75 | 21.25 | 26.25 | 22.50 | 12.50 | 0 | 0 |
| Sylvan Cave | 7 | 10 | 18.63 | 24.38 | 23.63 | 14.88 | 1.50 | 0 |
| Cave of Summons | 0 | 18.75 | 21.88 | 24.38 | 22.50 | 12.50 | 0 | 0 |
| Town of Summons | 8.75 | 16.25 | 30 | 29 | 14.75 | 1.25 | 0 | 0 |
| Sealed Cave | 8.75 | 8.75 | 21.25 | 26.25 | 22.50 | 12.50 | 0 | 0 |
| Cave Bahamut | 7 | 10 | 21.75 | 26.25 | 21.75 | 11.75 | 1.50 | 0 |
| Lunar Path | 7 | 10 | 21.75 | 26.25 | 21.75 | 11.75 | 1.50 | 0 |
| Giant of Bab-il | 0 | 7.50 | 21.25 | 26.25 | 24.75 | 17.25 | 3 | 0 |
| Lunar Subterrane/Core | 0 | 7.50 | 18.13 | 19.38 | 25.38 | 26.63 | 3 | 0 |
===== Trapped chests =====
Trapped chest rewards have their own distinct weightings:
^ Trapped chest location ^ Tier 1 ^ Tier 2 ^ Tier 3 ^ Tier 4 ^ Tier 5 ^ Tier 6 ^ Tier 7 ^ Tier 8 ^
| Tower of Zot | 0 | 0 | 0 | 5 | 20 | 32.50 | 24.38 | 18.13 |
| Eblan | 0 | 0 | 0 | 0 | 11.25 | 26.25 | 26.25 | 36.25 |
| Cave Eblan | 0 | 0 | 0 | 10 | 25 | 31.25 | 20 | 13.75 |
| Lower Bab-il | 0 | 0 | 0 | 15 | 31.88 | 31.38 | 11 | 10.75 |
| Upper Bab-il | 0 | 0 | 0 | 5 | 27.50 | 41.25 | 12.50 | 13.75 |
| Cave of Summons | 0 | 0 | 0 | 2.50 | 19.38 | 36.88 | 27.50 | 13.75 |
| Sylvan Cave | 0 | 0 | 0 | 2.50 | 13.75 | 26.25 | 25.63 | 31.88 |
| Giant of Bab-il | 0 | 0 | 0 | 0 | 11.25 | 26.25 | 25.63 | 36.88 |
| Lunar Path | 0 | 0 | 0 | 0 | 15 | 35 | 31.25 | 18.75 |
| Lunar Subterrane/Core | 0 | 0 | 0 | 0 | 3.75 | 11.25 | 21.25 | 63.75 |
===== Misc quests =====
Potential key item locations that do not award a key item (other than trapped chests, which are described above) receive rewards based on the weighting below. ("Ungated" quests are quests that can be completed without access to any key items.)
^ ^ Tier 1 ^ Tier 2 ^ Tier 3 ^ Tier 4 ^ Tier 5 ^ Tier 6 ^ Tier 7 ^ Tier 8 ^
| Quests | 0 | 0 | 0 | 20 | 42.50 | 37.50 | 0 | 0 |
| Gated Quests | 0 | 0 | 0 | 5 | 20 | 35 | 31.25 | 8.75 |
| Moon Quests | 0 | 0 | 0 | 0 | 11.25 | 31.25 | 39.38 | 18.13 |