Custom world generation/configured feature

• The root tag
  •  type: The type of configured feature. Must be one of the types listed below.
  •  config: The settings for this configured feature. The settings vary depending on type. Any name not listed under this tag has no settings; however, they must still include an empty config object in their definition.
    • If type is tree:
      •  trunk_provider: The block to use for the trunk. Note that provider block must be blocks with xyz axis tag, like logs, when the trunk placer is "fancy_trunk_placer"
        • Blockstate Provider
      •  leaves_provider: The block to use for the leaves.
        • Blockstate Provider
      •  foliage_placer: Controls how leaves are generated.
        •  radius:
          • Uniform Int with minBase 0, maxBase 8, and maxSpread 8
        •  offset:
          • Uniform Int with minBase 0, maxBase 8, and maxSpread 8
        •  type: The type of foliage placer to use. Must be one of "blob_foliage_placer", "spruce_foliage_placer", "pine_foliage_placer", "acacia_foliage_placer", "bush_foliage_placer", "fancy_foliage_placer", "jungle_foliage_placer", "mega_pine_foliage_placer", or "dark_oak_foliage_placer".
        • If type is blob_foliage_placer, bush_foliage_placer, fancy_foliage_placer, or jungle_foliage_placer:
          •  height: Affect the foliage height and size in block height. Must be between 0 and 16, inclusive.
        • If type is spruce_foliage_placer:
          •  trunk_height:
            • Uniform Int with minBase 0, maxBase 16, and maxSpread 8
        • If type is pine_foliage_placer:
          •  height:
            • Uniform Int with minBase 0, maxBase 16, and maxSpread 8
        • If type is mega_pine_foliage_placer:
          •  crown_height:
            • Uniform Int with minBase 0, maxBase 16, and maxSpread 8
      •  trunk_placer: Controls how the trunk is generated.
        •  type: The type of trunk placer to use. Must be one of "straight_trunk_placer", "forking_trunk_placer", "giant_trunk_placer", "mega_jungle_trunk_placer", "dark_oak_trunk_placer", or "fancy_trunk_placer".
        •  base_height: Must be between 0 and 32, inclusive.
        •  height_rand_a: Must be between 0 and 24, inclusive.
        •  height_rand_b: Must be between 0 and 24, inclusive.
      •  minimum_size:
        •  min_clipped_height (optional): Must be between 0 and 80, inclusive.
        •  type: Must be either "two_layers_feature_size" or "three_layers_feature_size".
        • If type is two_layers_feature_size:
          •  limit (optional): Must be between 0 and 81, inclusive. Defaults to 1 if not provided.
          •  lower_size (optional): Must be between 0 and 16, inclusive. Defaults to 0 if not provided.
          •  upper_size (optional): Must be between 0 and 16, inclusive. Defaults to 1 if not provided.
        • If type is three_layers_feature_size:
          •  limit (optional): Must be between 0 and 80, inclusive. Defaults to 1 if not provided.
          •  upper_limit (optional): Must be between 0 and 80, inclusive. Defaults to 1 if not provided.
          •  lower_size (optional): Must be between 0 and 16, inclusive. Defaults to 0 if not provided.
          •  middle_size (optional): Must be between 0 and 16, inclusive. Defaults to 1 if not provided.
          •  upper_size (optional): Must be between 0 and 16, inclusive. Defaults to 1 if not provided.
      •  decorators: Decorations to add to the tree apart from the trunk and leaves.
        • A decorator.
          •  type: The type of decoration to add. Must be one of "trunk_vine", "leave_vine", "cocoa", "beehive", or "alter_ground".
          • If type is cocoa or beehive:
            •  probability: Must be between 0 and 1, inclusive.
          • If type is alter_ground:
            •  provider: The block to replace the ground with.
              • Blockstate Provider
      •  max_water_depth (optional): The maximum depth of water this tree can generate in. Defaults to 0 if not provided.
      •  ignore_vines (optional): Defaults to false if not provided.
      •  heightmap: Must be one of "WORLD_SURFACE_WG", "WORLD_SURFACE", "OCEAN_FLOOR_WG", "OCEAN_FLOOR", "MOTION_BLOCKING", or "MOTION_BLOCKING_NO_LEAVES".
    • If type is flower or random_patch:
      •  state_provider: The block to use.
        • Blockstate Provider
      •  block_placer:
        •  type: The type of block placer to use. Must be one of "simple_block_placer", "double_plant_placer", or "column_placer".
        • If type is column_placer:
          •  min_size: The minimum height of the column of blocks.
          •  extra_size: The extra height (added to the minimum height) that the column can reach.
      •  whitelist: A list of block states that can be replaced. Includes all block states if left blank
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  blacklist: A list of block states that cannot be replaced.
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  tries (optional): Defaults to 128 if not provided.
      •  xspread (optional): Defaults to 7 if not provided.
      •  yspread (optional): Defaults to 3 if not provided.
      •  zspread (optional): Defaults to 7 if not provided.
      •  can_replace (optional): Defaults to false if not provided.
      •  project (optional): Defaults to true if not provided.
      •  need_water (optional): Defaults to false if not provided.
    • If type is block_pile or nether_forest_vegetation:
      •  state_provider: The block to use.
        • Blockstate Provider
    • If type is spring_feature:
      •  state: The fluid to use for the spring.
        •  Name: The namespaced id of the fluid to use.
        •  Properties: Fluid states
          •  state: A fluid state key and its value.
      •  requires_block_below (optional): Defaults to true if not provided.
      •  rock_count (optional): Defaults to 4 if not provided.
      •  hole_count (optional): Defaults to 1 if not provided.
      •  valid_blocks: A list of blocks.
        • : The namespaced id of the block to use.
    • If type is emerald_ore:
      •  target:
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  state:
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
    • If type is huge_red_mushroom or huge_brown_mushroom:
      •  cap_provider: The block to use for the cap.
        • Blockstate Provider
      •  stem_provider: The block to use for the stem.
        • Blockstate Provider
      •  foliage_radius (optional): The size of the cap. Defaults to 2 if not provided.
    • If type is iceberg, forest_rock, or lake:
      •  state:
        • A block state
          •  Name: The namespaced id of the block to use.
    • If type is disk or ice_patch:
      •  state:
        • A block state
          •  Name: The namespaced id of the block to use.
      •  radius:
        • Uniform Int with minBase 0, maxBase 4, and maxSpread 4
      •  half_height: Must be between 0 and 4, inclusive.
      •  targets:
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
    • If type is ore or no_surface_ore:
      •  target: Test for if a block can be replaced
        •  predicate_type: The test to perform. Must be one of "always_true", "block_match", "blockstate_match", "tag_match", "random_block_match", or "random_blockstate_match"
        • If predicate_type is block_match:
          •  block: The namespaced id of the block to match.
        • If predicate_type is blockstate_match:
          •  block_state The block state to match.
            •  Name: The namespaced id of the block to use.
            •  Properties: Block states
              •  state: A block state key and its value.
        • If predicate_type is tag_match:
          •  tag: The namespaced id of the block tag to match.
        • If predicate_type is random_block_match:
          •  block: The namespaced id of the block to match.
          •  probability: A number on the interval [0, 1] giving the probability of the vein 'growing' after seeding. Lower values correspond to smaller veins on average.
        • If predicate_type is random_blockstate_match:
          •  block_state The block state to match.
            •  Name: The namespaced id of the block to use.
            •  Properties: Block states
              •  state: A block state key and its value.
          •  probability:
      •  state: The block state to use for the ore.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  size: The size of the vein. Must be between 0 and 64, inclusive.
    • If type is end_spike:
      •  crystal_invulnerable (optional): Defaults to false if not provided.
      •  spikes: Settings for each individual spike.
        • A spike
          •  centerX (optional): Defaults to 0 if not provided.
          •  centerZ (optional): Defaults to 0 if not provided.
          •  radius (optional): The radius of the spike. Defaults to 0 if not provided.
          •  height (optional): The height of the spike. Defaults to 0 if not provided.
          •  guarded (optional): Whether or not to generate a cage around the crystal. Defaults to false if not provided.
      •  crystal_beam_target (optional): The position of a block.
        • The position's x coordinate.
        • The position's y coordinate.
        • The position's z coordinate.
    • If type is end_gateway:
      •  exit (optional): The position where the gateway portal should exit.
        • The position's x coordinate.
        • The position's y coordinate.
        • The position's z coordinate.
      •  exact:
    • If type is seagrass or bamboo:
      •  probability: Decimal probability between 0 and 1.
    • If type is sea_pickle:
      •  count:
        • Uniform Int with minBase -10, maxBase 128, and maxSpread 128
    • If type is simple_block:
      •  to_place: The block to place.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  place_on: Blocks to place on top of.
        • The block state to match.
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  place_in: Blocks to replace.
        • The block state to match.
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  place_under: Blocks to place under.
        • The block state to match.
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
    • If type is huge_fungus:
      •  valid_base_block: The block to place on top of.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  stem_state: The block to use for the stem.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  hat_state: The block to use for the hat.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  decor_state: The block to use for the decor.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  planted (optional): Defaults to false if not provided.
    • If type is basalt_columns:
      •  reach:
        • Uniform Int with minBase 0, maxBase 2, and maxSpread 1
      •  height:
        • Uniform Int with minBase 1, maxBase 5, and maxSpread 5
    • If type is delta_feature:
      •  contents: The block to use for the delta.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  rim: The block to use for the rim of the delta.
        •  Name: The namespaced id of the block to use.
        •  Properties: Block states
          •  state: A block state key and its value.
      •  size: The size of the delta.
        • Uniform Int with minBase 0, maxBase 8, and maxSpread 8
      •  rim_size: The size of the rim of the delta.
        • Uniform Int with minBase 0, maxBase 8, and maxSpread 8
    • If type is netherrack_replace_blobs:
      •  target:
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  state:
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
      •  radius:
        • Uniform Int
    • If type is fill_layer:
      •  height: The layer to fill.
      •  state: The block to fill with.
        • A block state
          •  Name: The namespaced id of the block to use.
          •  Properties: Block states
            •  state: A block state key and its value.
    • If type is random_selector:
      •  features: A list of other features to be randomly chosen from.
        • A feature and its corresponding chance
          •  feature: Another configured feature.
          •  chance: The chance of this feature being chosen.
      •  default: The configured feature to use if none of the above features are chosen.
    • If type is simple_random_selector:
      •  features: A list of other features to be randomly chosen from, each with equal chance.
        •  feature: Another configured feature.
    • If type is random_boolean_selector:
      •  feature_true: The configured feature to select if the randomly generated boolean is true.
      •  feature_false: The configured feature to select if the randomly generated boolean is true.
    • If type is decorated_feature_configuration:
      •  feature: The configured feature to use.
      •  decorator: The configured decorator to modify the feature with.