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  1. Minecraft: Java Edition
  2. MC-217195

Peak ore distribution with triangular distributions is one or two blocks lower than intended

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Details

    • Bug
    • Status: Resolved
    • Resolution: Works As Intended
    • 21w08b
    • None
    • None
    • Plausible
    • World generation

    Description

      When ores generate, the ores with a triangular distribution have a peak that is one block lower than the distribution implied by the chart here: https://twitter.com/henrikkniberg/status/1364635258260455425/photo/1

      I generated ore distributions in an Amplified world with seed 1 over an area of 262,144 chunks and plotted the distributions. I expected peaks of ore distributions to be at these Y levels:
      Coal: 95
      Iron: 31 and 255
      Copper: 47
      Gold: -17
      Lapis: 0
      (Redstone, and diamond excluded because their peaks are at the bottom of the world. Emerald excluded because its peak is high in the world.)

      What I actually found:

      Coal
      91:1.7729%
      92:1.7859%
      93:1.8131% <Highest
      94:1.8095%
      95:1.7866% <Expected highest
      96:1.7799%
      97:1.7628%
      98:1.7376%

      Iron:
      28:0.5401%
      29:0.5502%
      30:0.5535% <Highest
      31:0.5434% <Expected highest
      32:0.5300%
      33:0.5174%
      34:0.5055%
      35:0.4953%

      (The following is not reliable due to insufficient data)
      251:0.8123%
      252:0.8420% <Highest
      253:0.8404%
      254:0.8279%
      255:0.8373% <Expected highest
      256:0.8050%
      257:0.8153%
      258:0.7685%
      259:0.7547%

      Copper:
      43:0.6514%
      44:0.6691%
      45:0.6794%
      46:0.6798% <Highest
      47:0.6686% <Expected highest
      48:0.6511%
      49:0.6359%
      50:0.6214%
      51:0.6130%

      Gold:
      -21:0.3102%
      -20:0.3189%
      -19:0.3240% <Highest
      -18:0.3221%
      -17:0.3182% <Expected highest
      -16:0.3113%
      -15:0.3030%
      -14:0.2956%
      -13:0.2909%

      Lapis:
      -5:0.0742%
      -4:0.0757%
      -3:0.0769%
      -2:0.0773% <Highest
      -1:0.0755% <Expected highest
      0:0.0736%
      1:0.0715%
      2:0.0696%
      3:0.0687%
      4:0.0660%

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              hkniberg [Mojang] Henrik Kniberg
              bdm68 bdm68
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              Dates

                Created:
                Updated:
                Resolved:
                CHK: