Ancient Debris Generation in Bedrock Edition Doesn't Match Java Edition's Triangular Distribution

Ancient debris generation in Bedrock Edition currently uses a uniform distribution pattern between Y-levels 8-23, differing from Java Edition's triangular distribution (8-24). This implementation is hardcoded rather than data-driven, preventing proper cross-edition parity and optimal gameplay balance.

How to Reproduce:

1. Generate new Nether terrain in Bedrock Edition

2. Mine/map Ancient Debris locations between Y=8-23

3. Compare distribution patterns with Java Edition

Observed Result:

• Uniform distribution in Bedrock (equal chance all levels)

• Maximum Y-level stops at 23 (vs 24 in Java)

• No triangular concentration at mid-levels

Expected Result:
Ancient Debris should generate with:

1. Triangular distribution (peaking around Y=15)

2. Extended range to Y=24

3. Data-driven implementation matching provided JSON structure

(Implementation note: Requires modifying Core::Random distribution logic)

The following behavior pack JSON file can be used for the ancient debris feature, which, when added to the game files, will make ancient debris generation behave more similarly to the Java Edition:

{
  "format_version": "1.13.0",
  "minecraft:feature_rules": {
    "description": {
      "identifier": "minecraft:xxx",
      "places_feature": "minecraft:xxx"
    },
    "conditions": {
      "placement_pass": "underground_pass",
      "minecraft:biome_filter": [
        {
          "any_of": [
            {
              "test": "has_biome_tag",
              "operator": "==",
              "value": "nether"
            }
          ]
        }
      ]
    },
    "distribution": {
      "iterations": 2,
      "coordinate_eval_order": "zyx",
      "x": {
        "distribution": "uniform",
        "extent": [ 0, 16 ]
      },
      "y": {
        "distribution": "triangle",
        "extent": [ 8, 24 ]
      },
      "z": {
        "distribution": "uniform",
        "extent": [ 0, 16 ]
      }
    }
  }
}