Java Edition:Seed-Structure Mismatch
To do: Most of the sections need to be written up.
Every world generates structures randomly based on the seed. If the seed is the same, the structures should be the same. However, though the use of older versions and bugs, it was possible for structures not to match the world seed.
Addition of Structures
To do: Add the rest of the new additions of structures. This might also benefit from the use of a table to document the structures.
Every time a new structure is added to the game, the seed will determine where it will spawn. If a world existed before then, the loaded chunks where a certain structure was supposed to generate will not spawn the structure.
Addition of Dungeons
In Infdev 20100625-2, dungeons were added to the game. If a world existed before then, chunks which dungeons are usually supposed to generate in will not contain them.
Addition of Mineshafts
In 1.8 Pre-release, mineshafts were added to the game. If a world existed before then, chunks which mineshafts are usually supposed to generate in will not contain them.
Addition of Villages
In 1.8 Pre-release, villages were added to the game. If a world existed before then, chunks which villages are usually supposed to generate in will not contain them.
Addition of Strongholds
In 1.8 Pre-release, strongholds were added to the game. If a world existed before then, chunks which mineshafts are usually supposed to generate in will not contain them.
Addition of Nether Fortresses
In Beta 1.9 Prerelease, nether fortresses were added to the game. If a world existed before then, chunks which nether fortresses are usually supposed to generate in will not contain them.
Addition of Desert Wells
In 12w04a (1.2 snapshot), desert wells were added to the game. If a world existed before then, chunks which desert wells are usually supposed to generate in will not contain them.
Addition of Desert Pyramids
In 12w21a (1.3 snapshot), desert pyramids, or desert temples, were added to the game. If a world existed before then, chunks which desert temples are usually supposed to generate in will not contain them.
Addition of Jungle Pyramids
In 12w22a (1.3 snapshot), jungle pyramids, or jungle temples, were added to the game. If a world existed before then, chunks which jungle temples are usually supposed to generate in will not contain them.
Addition of Swamp Huts
In 12w40a (1.4 snapshot), swamp huts, or witch huts, were added to the game. If a world existed before then, chunks which witch huts are usually supposed to generate in will not contain them.
Addition of Ocean Monuments
In 14w25a (1.8 snapshot), ocean monuments were added to the game. If a world existed before then, chunks which ocean monuments are usually supposed to generate in will not contain them.
Addition of End Cities
In 15w31a (1.9 snapshot), end cities were added to the game. If a world existed before then, chunks which end cities are usually supposed to generate in will not contain them.
Addition of Igloos
In 15w31a (1.9 snapshot), igloos were added to the game. If a world existed before then, chunks which igloos are usually supposed to generate in will not contain them.
Addition of Woodland Mansions
In 16w39a (1.11 snapshot), woodland mansions were added to the game. If a world existed before then, chunks which woodland mansions are usually supposed to generate in will not contain them.
Addition of Ocean Ruins
In 18w09a (1.13 snapshot), ocean ruins were added to the game. If a world existed before then, chunks which ocean ruins are usually supposed to generate in will not contain them.
Addition of Buried Treasure Chests
In 18w10a (1.13 snapshot), buried treasure chests, or buried treasure, was added to the game. If a world existed before then, chunks which buried treasure is usually supposed to generate in will not contain it.
Addition of Shipwrecks
In 18w11a (1.13 snapshot), shipwrecks were added to the game. If a world existed before then, chunks which shipwrecks are usually supposed to generate in will not contain them.
Addition of Pillager Outposts
In 18w47a (1.14 snapshot), pillager outposts were added to the game. If a world existed before then, chunks which pillager outposts are usually supposed to generate in will not contain them.
Addition of Bastion Remnants
In 20w16a (1.16 snapshot), bastions were added to the game. If a world existed before then, chunks which bastions are usually supposed to generate in will not contain them.
Addition of Ruined Portals
In 20w16a (1.16 snapshot), ruined portals, or ruined nether portals, were added to the game. If a world existed before then, chunks which ruined nether portals are usually supposed to generate in will not contain them.
Addition of Ancient Cities
In Deep Dark Experimental Snapshot 1 (1.19 snapshot), ancient cities were added to the game. If a world existed before then, chunks which ancient cities are usually supposed to generate in will not contain them.
Addition of Trial Ruins
In 23w12a (1.20 snapshot), trail ruins were added to the game. If a world existed before then, chunks which trail ruins are usually supposed to generate in will not contain them.
Addition of Trial Chambers
In 23w45a (1.20 snapshot), trial chambers were added to the game. If a world existed before then, chunks which bastions are usually supposed to generate in will not contain them.
Addition of Ruined Portatols
In april fools' snapshot 24w14potato, a joke structure called the ruined portatol was added to the game. It was built up of many different types of potato blocks, which were also exclusive the the joke snapshot. If a world containing this structure is upgraded or downgraded, all of the potato blocks will be deleted[1], but the chest and its loot table will remain, proving that this structure once existed. Unfortunately, the loot table of this chest is semi-observable, because looking inside the chest will show that it contains items that other loot tables do not spawn. After opening the chest, the loot table is destroyed, destroying the discontinued aspect of the chest.
Deletion of Structures
Temporary Deletion of Ancient Cities
In 22w11a (1.19 snapshot), the ancient city structure added in the previous snapshot, Deep Dark Experimental Snapshot 1, was temporarily disabled from generating, thus making them and their loot tables discontinued from 22w11a to 22w12a (1.19 snapshot). Ancient cities started generating again in 22w13a (1.19 snapshot) with a few changes to the structure, making this a recontinued feature. The deletion of this structure is most likely intentional.[2]
Intended Changes to Structures
Unintended Changes to Structures
Jungle Temple Outside of Jungle
To test: Is this effect possible with other structures?
In 14w02a (1.8 snapshot), jungle temples could generate outside the jungle biome, meaning that they could generate inside of other biomes where they can't usually generate. Even though the jungle temples could spawn in other biomes, they would still be near the jungle biome, leading to massive bounding boxes.
Misaligned Witch Hut Bounding Boxes
To do: This section is not understood very well, please expand on it.
Incorrect Spawn Location End Cities
In 18w46a (1.14 snapshot), end cities could spawn in the void and even near the main end island due to a bug.[3]
21w13a End City Changes
In 21w13a (1.17 snapshot), the height of the entire end was unintentionally changed, causing the height of the end to "stretch to abnormal heights".[4] Since the generation of the end cities depends on the surrounding terrain, the end cities will spawn higher than usual, even "[getting] abruptly cut off at the maximum build height".[5]
Provability
Since one can easily replicate most of these structures, there are certain methods to prove that they are discontinued.
Past the World Border
Since these structures started existing after the addition of the world border, it was not possible to rebuild these structures using blocks past the world border.
Loot Tables
Most structures spawn with chests (or other containers) with loot tables. These loot tables cannot be recreated by the player without cheat methods, meaning that they serve as a way to prove the structure's authenticity as a discontinued feature.
World Seed
If a structure was added and changed the world
See Also
References
- ↑ This causes Vanishing Blocks.
- ↑ Nor in the version table for the structure page or on the ancient city page on the Minecraft Wiki is there a bug that is referenced when documenting the removal of this structure
- ↑ MC-139377. bugs.mojang.com.
- ↑ MC-221612. bugs.mojang.com.
- ↑ Quotes from 21w13a End Terrain.