Nether fortress

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Nether Fortress

The Nether

Consists of

See Structure

First appearances

See history

Nether fortresses are structures that are naturally generated in the Nether.

Generation[επεξεργασία | επεξεργασία κώδικα]

A nether fortress generated in the ground.

Nether fortresses tend to cluster together in strips that run along the Z-axis (north and south). Players who travel along the X-axis (east or west) will have the best chances of finding one; those who travel north or south may travel for hundreds or thousands of blocks before discovering a fortress.

Nether fortresses may be generated in inconvenient places, where half of or even the majority of the fortress is buried in netherrack. The interior will not be filled, however; all hallways and passages will be clear except for open walkways and bridges. It is rare, but possible for glowstone to generate inside of the fortress pathways.

Mobs[επεξεργασία | επεξεργασία κώδικα]

A blaze spawner generated into the side of some netherrack.

Nether fortresses use a list of possible mobs to spawn that is separate from the rest of the Nether. Nether fortresses spawn magma cubes at a much higher rate, and also spawn two exclusive mobs which cannot be found anywhere else: blazes and wither skeletons. Normal skeletons have a 20% chance to spawn in place of a wither skeleton. Ghasts do not spawn in fortresses.

Blazes are desired because of their main loot—blaze rods, as well as the high amount of experience they drop. Wither skeletons are mostly desired for their wither skeleton skulls, which are necessary to create the wither.

The spawning algorithm has two checks:

  1. It checks if the spawn coordinates are within the "bounding box" of each piece (e.g. corridor or walkway) of any fortress.
  2. It checks if the spawn coordinates are within the "bounding box" of the entire fortress, and that the block under the spawn location is nether brick.

If either check passes, it uses the special mob list for nether fortresses rather than the general list for the Nether when choosing the mob to spawn. The actual mob spawning proceeds as normal for the mob chosen from this list.

Structure[επεξεργασία | επεξεργασία κώδικα]

Αρχείο:2011-09-22 17.14.28.png
The general pattern of the walkways.
A lava well found inside nether fortress.

Nether fortresses are very large bridge-like complexes, composed mainly of nether bricks, that are supported by massive pillars that tower high above the lava oceans. A nether fortress has two areas, an exterior area of open bridges and an interior area of enclosed corridors. Both the bridges and corridors can end in a "broken" structure or may simply end without elaboration. Nether fortresses can tunnel through netherrack, giving the "exterior" areas an appearance of tunnels with nether brick floor and netherrack walls and ceilings. At broken sections the terrain is not cleared, which may create a tunnel that leads straight into a wall of netherrack.

The exterior consists of:

  • Straight bridges.
  • Up to 5 plain four-way crossings.
  • Up to 4 four-way crossings with arches made of nether brick and nether brick fence.
  • Up to 4 small rooms with a single entrance, and full-block "stairs" leading to the roof which may have a single path leading out.
  • Up to 2 blaze spawner platforms: structures consisting of three full-block "stairs" leading to a small platform fenced with nether brick fence, with a blaze spawner in the center.
Stairs in a nether fortress, with nether warts growing next to them.

The interior of the structures have 1×2 windows with nether brick fences as the windowpanes. The fences also form gate-like structures at the entrances of some rooms and corridors. Rooms include:

  • The lava well room, which is the connection between the interior and exterior areas.
  • Straight corridors.
  • Up to 5 four-way crossings.
  • Up to 20 corridor turns (10 right-turns and 10 left-turns), each with a 13 chance of having a loot chest in the corner.
  • Up to 3 stairways (made from actual stair blocks) leading downwards.
  • Up to 2 three-way intersections with a small exterior balcony.
  • Up to 2 stairways leading up to an open landing, which have patches of soul sand and nether wart at the base of the stairs, a corridor leading away from the upper landing, and a corridor behind the stairs. If the room is generates embedded in netherrack, only one block above the landing is cleared.

Blocks[επεξεργασία | επεξεργασία κώδικα]

Nether Brick
Nether Brick Fence
Nether Brick Stairs
Soul Sand
Nether Wart
Blaze Spawner

Loot[επεξεργασία | επεξεργασία κώδικα]

See also: Chest loot
A chest that generated in a nether fortress

Nether fortresses generate nether fortress loot with chests in the indoor sections placed at some interior points where corridors turn at right angles.

Each fortress chest contains 2–4 item stacks, with the following distribution:

Stack Size Weight # Items Chance # Chests
Gold Ingot 1–315731.23349.0%2.0
Saddle 110730.41135.3%2.8
Golden Horse Armor 18730.32929.1%3.4
Nether Wart 3–75731.02719.0%5.3
Iron Ingot 1–55730.61619.0%5.3
Diamond 1–35730.41119.0%5.3
Flint and Steel 15730.20519.0%5.3
Iron Horse Armor 15730.20519.0%5.3
Golden Sword 15730.20519.0%5.3
Golden Chestplate 15730.20519.0%5.3
Diamond Horse Armor 13730.12311.8%8.5
Obsidian 2–42730.2478.0%12.5

Video[επεξεργασία | επεξεργασία κώδικα]

History[επεξεργασία | επεξεργασία κώδικα]

Official release
1.0.0September 16, 2011Jens Bergensten tweets a teaser screenshot of changes to the Nether terrain generation, including nether fortresses.
September 19, 2011Jens releases a second teaser screenshot, showcasing the structure of the upcoming nether fortresses.
September 21, 2011Jens mentions that he is finished with most of the new Nether features, including two new mobs, one of which is a "retexturing attempt".
Beta 1.9-pre1Added nether fortresses.
1.4.212w36aWither skeletons and skeletons will now naturally spawn in nether fortresses.
1.6.113w18aChests will now generate.
1.814w27aNether fortresses are now affected by the "Generated structures" option.
14w30aAdded possibility of obsidian in chests.
1.915w43aReduced loot in chests from 2–5 stacks to 2–4.
Pocket Edition Alpha
0.12.1build 1Added nether fortresses.
Console Edition
TU7CU11.0Patch 1Added nether fortresses.
TU9Changed nether fortresses to make nether wart rooms more likely.
TU19CU71.12Chests will now generate.

Issues[επεξεργασία | επεξεργασία κώδικα]

Issues relating to “Nether fortress” are maintained on the issue tracker. Report issues there.

Trivia[επεξεργασία | επεξεργασία κώδικα]

  • Often, nether fortresses generate with no nether wart gardens in them at all. In some rare cases, a garden will have generated, but the nether wart will be partially or totally destroyed by falling lava.
  • In extremely rare cases, a nether fortress will not generate any indoor rooms except one single lava room.
  • Sometimes, two or more nether fortresses can generate very close or even within each other, ultimately creating an even larger cumulative nether fortress.

Gallery[επεξεργασία | επεξεργασία κώδικα]