GTCEuServerEvents.oreVeins(event => {
  event.removeAll()

  const passiveLayers = {
    moon: pattern => {
      pattern
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('ad_astra:moon_stone'))
            .size(2, 3)
        })
    },
    basalt: pattern => {
      pattern
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('minecraft:basalt'))
            .block(() => Block.getBlock('minecraft:smooth_basalt'))
            .size(2, 3)
        })
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('minecraft:blackstone'))
            .size(1, 2)
        })
    },
    soul_sand: pattern => {
      pattern
        .layer(l => {
          l
            .weight(4)
            .block(() => Block.getBlock('minecraft:soul_soil'))
            .block(() => Block.getBlock('minecraft:soul_sand'))
            .size(1, 3)
        })
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('minecraft:magma_block'))
            .size(1, 1)
        })
        .layer(l => {
          l
            .weight(4)
            .block(() => Block.getBlock('minecraft:basalt'))
            .block(() => Block.getBlock('minecraft:smooth_basalt'))
            .size(2, 3)
        })
    },
    tuff: pattern => {
      pattern
        .layer(l => {
          l
            .weight(2)
            .block(() => Block.getBlock('minecraft:tuff'))
            .block(() => Block.getBlock('minecraft:andesite'))
            .size(2, 3)
        })
        .layer(l => {
          l
            .weight(3)
            .block(() => Block.getBlock('minecraft:smooth_basalt'))
            .size(1, 2)
        })
    },
    dripstone: pattern => {
      pattern
        .layer(l => {
          l
            .weight(2)
            .block(() => Block.getBlock('minecraft:tuff'))
            .block(() => Block.getBlock('minecraft:deepslate'))
            .size(2, 3)
        })
        .layer(l => {
          l
            .weight(2)
            .block(() => Block.getBlock('minecraft:dripstone'))
            .size(1, 2)
        })
    },
    calcite: pattern => {
      pattern
        .layer(l => {
          l
            .weight(2)
            .block(() => Block.getBlock('minecraft:calcite'))
            .size(1, 1)
        })
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('minecraft:diorite'))
            .size(1, 1)
        })
    },
    deepslate: pattern => {
      pattern
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('minecraft:tuff'))
            .block(() => Block.getBlock('minecraft:deepslate'))
            .size(2, 3)
        })
        .layer(l => {
          l
            .weight(1)
            .block(() => Block.getBlock('minecraft:tuff'))
            .size(2, 2)
        })
    },
    endstone: pattern => {
      pattern
        .layer(l => {
          l
            .weight(2)
            .block(() => Block.getBlock('minecraft:endstone'))
            .size(1, 6)
        })
    },
  }

  function addVein(
    name,
    worldGenLayer,
    size,
    weight,
    minHeightRange,
    maxHeightRange,
    indicatorMaterial,
    indicatorPlacement,	// 'above', 'below', or 'surface'
    passiveLayers,
    layers
  ) {
    console.log('kubejs:' + name)
    event.add('kubejs:' + name, vein => {
      vein.clusterSize(size)
      vein.weight(weight)
      vein.density(1.0)
      vein.discardChanceOnAirExposure(0)
      vein.layer(worldGenLayer)
      switch (worldGenLayer) {
        case GTWorldGenLayers.STONE:
        case GTWorldGenLayers.DEEPSLATE:
          vein.dimensions('minecraft:overworld')
          vein.biomes('#minecraft:is_overworld')
          break
        case GTWorldGenLayers.NETHERRACK:
          vein.dimensions('minecraft:the_nether')
          vein.biomes('#minecraft:is_nether')
          break
        case GTWorldGenLayers.ENDSTONE:
          vein.dimensions('minecraft:the_end')
          vein.biomes('#minecraft:is_end')
          break
        case 'moon':
          vein.dimensions('ad_astra:moon')
          vein.biomes('ad_astra:lunar_wastelands')
          break
        default:
          console.error("Unknown layer type: '" + worldGenLayer + "'")
      }
      vein.heightRangeUniform(minHeightRange, maxHeightRange)
      vein.layeredVeinGenerator(generator =>
        generator.buildLayerPattern(pattern => {
          passiveLayers(pattern)
          layers(pattern)
        })
      )
      vein.surfaceIndicatorGenerator(i =>
        i
          .surfaceRock(indicatorMaterial)
          .placement(indicatorPlacement)
      )
    })
  }

  // Moon veins
  addVein('bauxite_vein_moon', 'moon', 25, 40, 10, 80, GTMaterials.Bauxite, 'above', passiveLayers.moon, pattern => {
    pattern
      .layer(l => l.weight(2).mat(GTMaterials.Bauxite).size(1, 4))
      .layer(l => l.weight(1).mat(GTMaterials.Ilmenite).size(1, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Aluminium).size(1, 1))
  })

  // End veins
  addVein('bauxite_vein_end', GTWorldGenLayers.ENDSTONE, 25, 40, 10, 80, GTMaterials.Bauxite, 'above', passiveLayers.endstone, pattern => {
    pattern
      .layer(l => l.weight(2).mat(GTMaterials.Bauxite).size(1, 4))
      .layer(l => l.weight(1).mat(GTMaterials.Ilmenite).size(1, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Aluminium).size(1, 1))
  })
  addVein('magnetite_vein_end', GTWorldGenLayers.ENDSTONE, 25, 30, 20, 80, GTMaterials.Magnetite, 'above', passiveLayers.endstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Magnetite).size(1, 4))
      .layer(l => l.weight(2).mat(GTMaterials.VanadiumMagnetite).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Chromite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Gold).size(1, 1))
  })
  addVein('naquadah_vein', GTWorldGenLayers.ENDSTONE, 25, 30, 10, 90, GTMaterials.Naquadah, 'above', passiveLayers.endstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Naquadah).size(1, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Plutonium239).size(1, 2))
  })
  addVein('pitchblende_vein_end', GTWorldGenLayers.ENDSTONE, 25, 30, 30, 60, GTMaterials.Pitchblende, 'above', passiveLayers.endstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Pitchblende).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Uraninite).size(1, 2))
  })
  addVein('scheelite_vein', GTWorldGenLayers.ENDSTONE, 25, 20, 20, 60, GTMaterials.Scheelite, 'above', passiveLayers.endstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Scheelite).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Tungstate).size(1, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Lithium).size(1, 2))
  })
  addVein('sheldonite_vein', GTWorldGenLayers.ENDSTONE, 20, 10, 5, 50, GTMaterials.Platinum, 'above', passiveLayers.endstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Bornite).size(2, 4))
      .layer(l => l.weight(2).mat(GTMaterials.Cooperite).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Platinum).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Palladium).size(1, 1))
  })

  // Nether veins
  addVein('banded_iron_vein', GTWorldGenLayers.NETHERRACK, 30, 30, 20, 40, GTMaterials.Goethite, 'above', passiveLayers.soul_sand, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Goethite).size(1, 4))
      .layer(l => l.weight(2).mat(GTMaterials.YellowLimonite).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Hematite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Gold).size(1, 1))
  })
  addVein('beryllium_vein', GTWorldGenLayers.NETHERRACK, 25, 30, 5, 30, GTMaterials.Beryllium, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Beryllium).size(1, 4))
      .layer(l => l.weight(4).mat(GTMaterials.Emerald).size(1, 2))
  })
  addVein('certus_quartz', GTWorldGenLayers.NETHERRACK, 20, 40, 80, 120, GTMaterials.CertusQuartz, 'below', passiveLayers.soul_sand, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Quartzite).size(2, 4))
      .layer(l => l.weight(2).mat(GTMaterials.CertusQuartz).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Barite).size(1, 1))
  })
  addVein('manganese_vein', GTWorldGenLayers.NETHERRACK, 25, 20, 20, 30, GTMaterials.Grossular, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Grossular).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Pyrolusite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Tantalite).size(1, 1))
  })
  addVein('molybdenum_vein', GTWorldGenLayers.NETHERRACK, 20, 5, 20, 50, GTMaterials.Molybdenum, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Wulfenite).size(1, 3))
      .layer(l => l.weight(2).mat(GTMaterials.Molybdenite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Molybdenum).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Powellite).size(1, 1))
  })
  addVein('monazite_vein', GTWorldGenLayers.NETHERRACK, 20, 30, 20, 40, GTMaterials.Bastnasite, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Bastnasite).size(1, 3))
      .layer(l => l.weight(1).mat(GTMaterials.Molybdenum).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Neodymium).size(1, 1))
  })
  addVein('nether_quartz_vein', GTWorldGenLayers.NETHERRACK, 25, 80, 40, 80, GTMaterials.NetherQuartz, 'above', passiveLayers.soul_sand, pattern => {
    pattern
      .layer(l => l.weight(4).mat(GTMaterials.NetherQuartz).size(2, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Quartzite).size(1, 1))
  })
  addVein('redstone_vein', GTWorldGenLayers.NETHERRACK, 25, 60, 5, 40, GTMaterials.Redstone, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Redstone).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Quartzite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Quartzite).size(1, 1))
  })
  addVein('saltpeter_vein', GTWorldGenLayers.NETHERRACK, 25, 40, 5, 45, GTMaterials.Saltpeter, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Saltpeter).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Diatomite).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Electrotine).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Alunite).size(1, 1))
  })
  addVein('sulfur_vein', GTWorldGenLayers.NETHERRACK, 25, 100, 10, 30, GTMaterials.Sulfur, 'above', passiveLayers.basalt, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Sulfur).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Pyrite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Sphalerite).size(1, 1))
  })
  addVein('tetrahedrite_vein', GTWorldGenLayers.NETHERRACK, 30, 70, 80, 120, GTMaterials.Tetrahedrite, 'below', passiveLayers.soul_sand, pattern => {
    pattern
      .layer(l => l.weight(4).mat(GTMaterials.Tetrahedrite).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Copper).size(1, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Stibnite).size(1, 2))
  })
  addVein('topaz_vein', GTWorldGenLayers.NETHERRACK, 20, 70, 80, 120, GTMaterials.Topaz, 'below', passiveLayers.soul_sand, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.BlueTopaz).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Topaz).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Chalcocite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Bornite).size(1, 1))
  })

  // Overworld veins
  // Stone
  addVein('apatite_vein', GTWorldGenLayers.STONE, 25, 40, 10, 80, GTMaterials.Apatite, 'above', passiveLayers.calcite, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Apatite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.TricalciumPhosphate).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Pyrochlore).size(1, 1))
  })
  addVein('cassiterite_vein', GTWorldGenLayers.STONE, 25, 80, 10, 80, GTMaterials.Cassiterite, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(4).mat(GTMaterials.Tin).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Cassiterite).size(1, 1))
  })
  addVein('coal_vein', GTWorldGenLayers.STONE, 30, 80, 10, 140, GTMaterials.Coal, 'surface', passiveLayers.calcite, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Coal).size(2, 3))
  })
  addVein('copper_tin_vein', GTWorldGenLayers.STONE, 30, 50, -10, 160, GTMaterials.Chalcopyrite, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(5).mat(GTMaterials.Chalcopyrite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Zeolite).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Cassiterite).size(1, 2))
      .layer(l => l.weight(1).mat(GTMaterials.Realgar).size(1, 2))
  })
  addVein('galena_vein', GTWorldGenLayers.STONE, 25, 40, -15, 45, GTMaterials.Galena, 'surface', passiveLayers.dripstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Galena).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Silver).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Lead).size(1, 1))
  })
  addVein('garnet_tin_vein', GTWorldGenLayers.STONE, 25, 80, 30, 60, GTMaterials.GarnetSand, 'surface', passiveLayers.dripstone, pattern => {
    pattern
      .layer(l => l.weight(2).state(() => Block.getBlock('minecraft:sand').defaultBlockState()).size(1, 1))
      .layer(l => l.weight(3).mat(GTMaterials.CassiteriteSand).size(2, 3))
      .layer(l => l.weight(2).mat(GTMaterials.GarnetSand).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Asbestos).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Diatomite).size(1, 1))
  })
  addVein('garnet_vein', GTWorldGenLayers.STONE, 25, 40, -10, 50, GTMaterials.GarnetRed, 'above', passiveLayers.dripstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.GarnetRed).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.GarnetYellow).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Amethyst).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Opal).size(1, 1))
  })
  addVein('iron_vein', GTWorldGenLayers.STONE, 30, 120, -10, 60, GTMaterials.Goethite, 'surface', passiveLayers.deepslate, pattern => {
    pattern
      .layer(l => l.weight(5).mat(GTMaterials.Goethite).size(1, 2))
      .layer(l => l.weight(2).mat(GTMaterials.YellowLimonite).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Hematite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Malachite).size(1, 1))
  })
  addVein('lubricant_vein', GTWorldGenLayers.STONE, 20, 40, 0, 50, GTMaterials.Talc, 'surface', passiveLayers.calcite, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Soapstone).size(2, 3))
      .layer(l => l.weight(2).mat(GTMaterials.Talc).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.GlauconiteSand).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Pentlandite).size(1, 1))
  })
  addVein('magnetite_vein_ow', GTWorldGenLayers.STONE, 25, 80, 10, 60, GTMaterials.Magnetite, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Magnetite).size(2, 3))
      .layer(l => l.weight(2).mat(GTMaterials.VanadiumMagnetite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Gold).size(1, 1))
  })
  addVein('mineral_sand_vein', GTWorldGenLayers.STONE, 25, 80, 15, 60, GTMaterials.BasalticMineralSand, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(2).state(() => Block.getBlock('minecraft:sand').defaultBlockState()).size(1, 1))
      .layer(l => l.weight(3).mat(GTMaterials.BasalticMineralSand).size(2, 3))
      .layer(l => l.weight(2).mat(GTMaterials.GraniticMineralSand).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.FullersEarth).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Gypsum).size(1, 1))
  })
  addVein('nickel_vein', GTWorldGenLayers.STONE, 25, 40, -10, 60, GTMaterials.Nickel, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Garnierite).size(2, 3))
      .layer(l => l.weight(2).mat(GTMaterials.Nickel).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Cobaltite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Pentlandite).size(1, 1))
  })
  addVein('salts_vein', GTWorldGenLayers.STONE, 25, 50, 30, 70, GTMaterials.Salt, 'surface', passiveLayers.calcite, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.RockSalt).size(2, 3))
      .layer(l => l.weight(2).mat(GTMaterials.Salt).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Lepidolite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Spodumene).size(1, 1))
  })
  addVein('oilsands_vein', GTWorldGenLayers.STONE, 20, 40, 30, 80, GTMaterials.Oilsands, 'surface', passiveLayers.deepslate, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Oilsands).size(2, 3))
      .layer(l => l.weight(4).mat(GTMaterials.Oilsands).size(1, 1))
  })
  // Deepslate
  addVein('copper_vein', GTWorldGenLayers.DEEPSLATE, 25, 80, -40, 10, GTMaterials.Copper, 'surface', passiveLayers.dripstone, pattern => {
    pattern
      .layer(l => l.weight(5).mat(GTMaterials.Chalcopyrite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Iron).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Pyrite).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Copper).size(1, 1))
  })
  addVein('diamond_vein', GTWorldGenLayers.DEEPSLATE, 25, 40, -65, 30, GTMaterials.Diamond, 'above', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Graphite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Diamond).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Coal).size(1, 1))
  })
  addVein('lapis_vein', GTWorldGenLayers.DEEPSLATE, 25, 40, -60, 10, GTMaterials.Lapis, 'above', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Lazurite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Sodalite).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Lapis).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Calcite).size(1, 1))
  })
  addVein('manganese_vein_ow', GTWorldGenLayers.DEEPSLATE, 30, 20, -30, 0, GTMaterials.Grossular, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Grossular).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Spessartine).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Pyrolusite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Tantalite).size(1, 1))
  })
  addVein('mica_vein', GTWorldGenLayers.DEEPSLATE, 25, 20, -40, -10, GTMaterials.Mica, 'surface', passiveLayers.calcite, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Kyanite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Mica).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Bauxite).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Pollucite).size(1, 1))
  })
  addVein('olivine_vein', GTWorldGenLayers.DEEPSLATE, 25, 20, -20, 10, GTMaterials.Olivine, 'surface', passiveLayers.dripstone, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Bentonite).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Magnetite).size(1, 1))
      .layer(l => l.weight(2).mat(GTMaterials.Olivine).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.GlauconiteSand).size(1, 1))
  })
  addVein('redstone_vein_ow', GTWorldGenLayers.DEEPSLATE, 25, 60, -65, -10, GTMaterials.Redstone, 'surface', passiveLayers.tuff, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Redstone).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Ruby).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Cinnabar).size(1, 1))
  })
  addVein('sapphire_vein', GTWorldGenLayers.DEEPSLATE, 20, 60, -40, 0, GTMaterials.Sapphire, 'above', passiveLayers.calcite, pattern => {
    pattern
      .layer(l => l.weight(3).mat(GTMaterials.Almandine).size(2, 2))
      .layer(l => l.weight(2).mat(GTMaterials.Pyrope).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.Sapphire).size(1, 1))
      .layer(l => l.weight(1).mat(GTMaterials.GreenSapphire).size(1, 1))
  })
})