NTM Machine, World and Server Configuration Reference

Beyond the general feature flags, NTM splits its more specialised configuration across several focused classes, each writing to a dedicated category inside config/HBM_NTM.cfg. This page covers MachineConfig (RTG/betavoltaic decay), WeaponConfig (CIWS accuracy, dangerous item drops, animation style), BombConfig (per-weapon explosion radii and blast parameters), WorldConfig (ore spawn rates, structure frequencies, meteor settings, and biome IDs), and ServerConfig (a JSON-backed runtime config for server operators). All settings except those marked otherwise can be applied without a full restart using /ntmreload.

Run /ntmreload after editing HBM_NTM.cfg to apply most changes instantly. Changes to ore-generation rates, biome IDs, and world provider registration always require a full Minecraft restart and affect only newly generated chunks.

Machine Config — `09_machines`

The machine category currently controls RTG (Radioisotope Thermoelectric Generator) and betavoltaic cell behaviour.

9.00 — scaleRTGPower

Field	Value
Key	`9.00_scaleRTGPower`
Category	`09_machines`
Type	Boolean
Default	`false`

When enabled, the power output of RTG and betavoltaic fuel scales down proportionally as the fuel decays. A fully fresh fuel cell produces maximum power; a nearly-depleted one produces very little. When disabled, RTGs produce constant power regardless of their remaining fuel lifetime.

9.01 — doRTGsDecay

Field	Value
Key	`9.01_doRTGsDecay`
Category	`09_machines`
Type	Boolean
Default	`true`

Whether RTG and betavoltaic fuel decays at all over time. Set to false for infinite-duration fuel cells — useful in creative or test environments, but removes a key resource management aspect of the late game.

Weapon Config

Weapon-related options are spread across two categories: 07_missile_machines for CIWS behaviour, 10_dangerous_drops for item drop physics, and 18_weapons for animation preferences.

7.03 — ciwsAccuracy (CIWS hit rate)

Field	Value
Key	`7.03_ciwsAccuracy`
Category	`07_missile_machines`
Type	Integer
Default	`50`

An additional modifier applied to the CIWS (Close-In Weapon System) interception accuracy. Higher values increase hit probability against incoming projectiles such as missiles. This is a raw modifier, not a percentage — consult the CIWS entity code for how it is applied in the interception formula.

10.00 — dropCell — Antimatter cell drops

Field	Value
Key	`10.00_dropCell`
Category	`10_dangerous_drops`
Type	Boolean
Default	`true`

When true, dropping an antimatter cell item on the ground causes it to explode. Set to false to make antimatter cells safe to drop (e.g. for servers that use item-sorting pipes).

10.01 — dropBHole — Singularity / black hole drops

Field	Value
Key	`10.01_dropBHole`
Category	`10_dangerous_drops`
Type	Boolean
Default	`true`

When true, dropping singularity or black hole items spawns the corresponding entity. Disable to prevent accidental singularity creation when managing inventory near storage.

10.02 — dropStar — Star blaster cell drops

Field	Value
Key	`10.02_dropStar`
Category	`10_dangerous_drops`
Type	Boolean
Default	`true`

When true, dropping rigged star blaster cells causes them to explode on contact with the ground.

10.04 — dropCrys — Xen crystal drops

Field	Value
Key	`10.04_dropCrys`
Category	`10_dangerous_drops`
Type	Boolean
Default	`true`

When true, dropping xen crystals causes them to push or displace nearby blocks on impact.

10.05 — dropDead — Dead man's explosive drops

Field	Value
Key	`10.05_dropDead`
Category	`10_dangerous_drops`
Type	Boolean
Default	`true`

When true, dropping dead man’s explosives causes them to detonate. Disable if you want to handle these items safely in pipes or sorting systems.

18.00 — linearAnimations — Weapon animation style

Field	Value
Key	`18.00_linearAnimations`
Category	`18_weapons`
Type	Boolean
Default	`false`

When true, replaces NTM’s heavily stylised (non-linear, cinematic) weapon animations with more conventional linear animations. Useful for players who find the default animations disorienting or too flashy.

Bomb Config — Explosion Radii & Blast Parameters

The 03_nukes and 06_explosions categories let server operators tune every explosion in the mod — from handheld grenades to the Tsar Bomba. All radius values are in blocks.

Per-device explosion radii (3.00–3.13)

Key	Device	Default Radius
`3.00_gadgetRadius`	The Gadget (Trinity-style)	`150`
`3.01_boyRadius`	Little Boy	`120`
`3.02_manRadius`	Fat Man	`175`
`3.03_mikeRadius`	Ivy Mike	`250`
`3.04_tsarRadius`	Tsar Bomba	`500`
`3.05_prototypeRadius`	Prototype device	`150`
`3.06_fleijaRadius`	F.L.E.I.J.A.	`50`
`3.07_missileRadius`	Nuclear missile	`100`
`3.08_mirvRadius`	MIRV warhead	`100`
`3.09_fatmanRadius`	Fatman Launcher	`35`
`3.10_nukaRadius`	Nuka grenade	`25`
`3.11_aSchrabRadius`	Dropped anti-schrabidium	`20`
`3.12_soliniumRadius`	Blue Rinse / solinium	`150`
`3.13_n2Radius`	N2 mine	`200`

Each value is an integer read directly from the 03_nukes config category. Changing these values affects all future detonations of that device.

6.00 — limitExplosionLifespan

Field	Value
Key	`6.00_limitExplosionLifespan`
Category	`06_explosions`
Type	Integer
Default	`0`

How many seconds (based on system time) a procedural explosion can remain loaded in an unloaded chunk before it is automatically terminated. 0 disables this limit. Useful on servers where abandoned explosions in unloaded areas waste memory.

6.01 — blastSpeed

Field	Value
Key	`6.01_blastSpeed`
Category	`06_explosions`
Type	Integer
Default	`1024`

Base propagation speed of MK3 system explosions (old-style and schrabidium detonations), measured in blocks per tick. Higher values cause the blast wave to expand faster but may increase per-tick load during the explosion event.

6.02 — mk5BlastTime

Field	Value
Key	`6.02_mk5BlastTime`
Category	`06_explosions`
Type	Integer
Default	`50`

Minimum number of milliseconds per game tick allocated for MK5 chunk processing during an active explosion. Higher values give the MK5 explosion system more time per tick, producing a faster-looking blast at the cost of higher CPU usage.

6.03 — falloutRange

Field	Value
Key	`6.03_falloutRange`
Category	`06_explosions`
Type	Integer
Default	`100`

The radius of the nuclear fallout area, expressed as a percentage of the base explosion radius. 100 means fallout extends as far as the explosion itself. 200 would double the fallout radius relative to the blast radius.

6.04 — falloutDelay

Field	Value
Key	`6.04_falloutDelay`
Category	`06_explosions`
Type	Integer
Default	`4`

Number of ticks to wait between fallout chunk computation steps. Increasing this value spreads fallout processing over more ticks, reducing instantaneous server load at the cost of slower fallout spread.

6.05 — enableChunkLoading

Field	Value
Key	`6.05_enableChunkLoading`
Category	`06_explosions`
Type	Boolean
Default	`true`

Allows all procedural explosions to force-load the central chunk and generate new chunks as the blast wave expands. Disabling this prevents explosions from loading unloaded terrain but may cause the blast to stop prematurely at chunk boundaries.

6.06 — explosionAlgorithm

Field	Value
Key	`6.06_explosionAlgorithm`
Category	`06_explosions`
Type	Integer (`0`, `1`, or `2`)
Default	`2`

Selects the algorithm used for MK5 explosion processing:

0 — Legacy: Original explosion algorithm.
1 — Threaded DDA: Uses a Digital Differential Analyzer on a background thread for faster processing.
2 — Threaded DDA with damage accumulation (default): Same as mode 1 but also accumulates material resistance along each ray, producing more physically accurate crater shapes.

World Config — Ore Generation

All ore spawn rates are in the 02_ores category. Overworld rates are veins-per-chunk; bedrock ore rates are spawn weights (higher = more common relative to other bedrock ores); nether rates are veins-per-chunk in the Nether.

Dimension ore toggles (2.D00–2.D02)

Key	Description	Default
`2.D00_overworldOres`	Master switch for overworld ore generation	`true`
`2.D01_netherOres`	Master switch for Nether ore generation	`true`
`2.D02_endOres`	Master switch for End ore generation	`true`

These do not affect special structures like oil bubbles or trixite crystals.

Overworld ore spawn rates (2.00–2.23)

Key	Ore	Default (veins/chunk)
`2.00_uraniumSpawnrate`	Uranium	`7`
`2.01_titaniumSpawnrate`	Titanium	`8`
`2.02_sulfurSpawnrate`	Sulfur	`5`
`2.03_aluminiumSpawnrate`	Aluminium	`7`
`2.04_copperSpawnrate`	Copper	`12`
`2.05_fluoriteSpawnrate`	Fluorite	`6`
`2.06_niterSpawnrate`	Niter	`6`
`2.07_tungstenSpawnrate`	Tungsten	`10`
`2.08_leadSpawnrate`	Lead	`6`
`2.09_berylliumSpawnrate`	Beryllium	`6`
`2.10_thoriumSpawnrate`	Thorium	`7`
`2.11_ligniteSpawnrate`	Lignite	`2`
`2.12_asbestosSpawnRate`	Asbestos	`2`
`2.13_lithiumSpawnRate`	Schist lithium	`6`
`2.14_rareEarthSpawnRate`	Rare earth	`6`
`2.16_gasShaleSpawnRate`	Oil shale	`5`
`2.17_gasBubbleSpawnRate`	Gas bubble (1-in-N chunks)	`12`
`2.18_cinnebarSpawnRate`	Cinnebar	`1`
`2.18_cobaltSpawnRate`	Cobalt	`2`
`2.19_explosiveBubbleSpawnRate`	Explosive gas bubble (1-in-N chunks, 0 = off)	`0`
`2.20_alexandriteSpawnRate`	Alexandrite (1-in-N chunks)	`100`
`2.21_oilSpawnRate`	Oil bubble (1-in-N chunks)	`100`
`2.22_bedrockOilSpawnRate`	Bedrock oil node (1-in-N chunks)	`200`
`2.23_meteoriteSpawnRate`	Fallen meteorite (1-in-N chunks)	`200`

New bedrock ores (2.NB, 2.B00–2.BN01)

Key	Ore	Default Weight
`2.NB_newBedrockOres`	Master toggle for new bedrock ores	`true`
`2.B00_bedrockIronWeight`	Iron	`100`
`2.B01_bedrockCopperWeight`	Copper	`200`
`2.B02_bedrockBoraxWeight`	Borax	`50`
`2.B03_bedrockAsbestosWeight`	Asbestos	`50`
`2.B04_bedrockNiobiumWeight`	Niobium	`50`
`2.B05_bedrockTitaniumWeight`	Titanium	`100`
`2.B06_bedrockTungstenWeight`	Tungsten	`100`
`2.B07_bedrockGoldWeight`	Gold	`50`
`2.B08_bedrockUraniumWeight`	Uranium	`35`
`2.B09_bedrockThoriumWeight`	Thorium	`50`
`2.B10_bedrockCoalWeight`	Coal	`200`
`2.B11_bedrockNiterWeight`	Niter	`50`
`2.B12_bedrockFluoriteWeight`	Fluorite	`50`
`2.B13_bedrockRedstoneWeight`	Redstone	`50`
`2.B14_bedrockChlorocalciteWeight`	Chlorocalcite	`35`
`2.B15_bedrockNeodymiumWeight`	Neodymium	`50`
`2.B16_bedrockRareEarthWeight`	Rare earth	`50`
`2.B17_bedrockBauxiteWeight`	Bauxite	`100`
`2.B18_bedrockEmeraldWeight`	Emerald	`50`
`2.BN00_bedrockGlowstoneWeight`	Glowstone (Nether)	`100`
`2.BN01_bedrockPhosphorusWeight`	Phosphorus (Nether)	`50`
`2.BN01_bedrockQuartzWeight`	Quartz (Nether)	`100`

Ore clusters & special deposits (2.C00–2.L02)

Key	Description	Default
`2.C00_ironClusterSpawn`	Iron cluster veins/chunk	`4`
`2.C01_titaniumClusterSpawn`	Titanium cluster veins/chunk	`2`
`2.C02_aluminiumClusterSpawn`	Aluminium cluster veins/chunk	`3`
`2.C03_copperClusterSpawn`	Copper cluster veins/chunk	`4`
`2.L00_enableHematite`	Toggle hematite deposits	`true`
`2.L01_enableMalachite`	Toggle malachite deposits	`true`
`2.L02_enableBauxite`	Toggle bauxite deposits	`true`
`2.L02_limestoneSpawn`	Limestone veins/chunk	`1`
`2.C00_enableSulfurCave`	Toggle sulfur caves	`true`
`2.C01_enableAsbestosCave`	Toggle asbestos caves	`true`

Nether & End ore rates (2.N00–2.E00)

Key	Ore	Default (veins/chunk)
`2.N00_uraniumSpawnrate`	Nether uranium	`8`
`2.N01_tungstenSpawnrate`	Nether tungsten	`10`
`2.N02_sulfurSpawnrate`	Nether sulfur	`26`
`2.N03_phosphorusSpawnrate`	Nether phosphorus	`24`
`2.N04_coalSpawnrate`	Nether coal	`8`
`2.N05_plutoniumSpawnrate`	Nether plutonium (if enabled)	`8`
`2.N06_cobaltSpawnrate`	Nether cobalt	`2`
`2.E00_tikiteSpawnrate`	End trixite	`8`

World Config — Structure & Event Frequencies

All structure frequencies in the 04_dungeons and related categories use a 1-in-N-chunks model: higher values mean rarer spawns. Values that would evaluate to zero or below are automatically replaced with a safe default.

Structure spawn rates (4.01–4.24)

Key	Structure	Default (1 per N chunks)
`4.01_antennaSpawn`	Radio antenna	`250`
`4.02_atomSpawn`	Power plant	`500`
`4.04_dungeonSpawn`	Library dungeon	`64`
`4.06_satelliteSpawn`	Satellite dish	`500`
`4.10_dudSpawn`	Dud bomb	`500`
`4.11_spaceshipSpawn`	Spaceship crash	`1000`
`4.12_barrelSpawn`	Waste tank	`5000`
`4.13_broadcasterSpawn`	Corrupt broadcaster	`5000`
`4.14_landmineSpawn`	AP landmine	`64`
`4.15_radHotspotSpawn`	Radiation hotspot	`5000`
`4.16_vaultSpawn`	Locked safe	`2500`
`4.18_geyserChlorineSpawn`	Poison geyser	`3000`
`4.19_geyserVaporSpawn`	Vapor geyser	`250`
`4.21_capsuleSpawn`	Landing capsule	`100`
`4.22_arcticVaultSpawn`	Arctic code vault	`500`
`4.23_jungleDungeonSpawn`	Jungle dungeon	`2000`
`4.24_pyramidSpawn`	Pyramid	`4000`

Meteor settings (5.00–5.05)

Key	Description	Default
`5.00_enableMeteorStrikes`	Toggle meteor impact events	`true`
`5.01_enableMeteorShowers`	Toggle meteor showers (1% chance per spawned meteor)	`true`
`5.02_enableMeteorTails`	Toggle particle trails on falling meteors	`true`
`5.03_enableSpecialMeteors`	Toggle rare special-impact meteors	`true`
`5.03_meteorStrikeChance`	Average ticks between meteor strikes	`216000` (≈3 h)
`5.04_meteorShowerChance`	Average ticks between meteors during a shower	`18000` (≈15 min)
`5.05_meteorShowerDuration`	Max shower duration in ticks	`36000` (≈30 min)

Crater biome settings (17.B, 17.R00–17.R03)

Key	Description	Default
`17.B_toggle`	Toggle biome changes caused by nuclear explosions	`true`
`17.B00_craterBiomeId`	Biome ID for crater biome	`80`
`17.B01_craterBiomeInnerId`	Biome ID for inner crater	`81`
`17.B02_craterBiomeOuterId`	Biome ID for outer crater rim	`82`
`17.R00_craterBiomeRad`	RAD/s in the crater biome	`5.0`
`17.R01_craterBiomeInnerRad`	RAD/s in the inner crater	`25.0`
`17.R02_craterBiomeOuterRad`	RAD/s in the outer crater rim	`0.5`
`17.R03_craterBiomeWaterMult`	RAD/s multiplier when in water within crater biomes	`5.0`

Biome ID values must not conflict with other mods’ biome IDs. If you change these, do so before creating the world — biome IDs are baked into chunk data and cannot be remapped retroactively.

Server Config — `hbmServer.json`

Unlike the Forge .cfg file, ServerConfig is backed by a JSON file at config/hbmConfig/hbmServer.json. It is created automatically on first launch and can be edited in-game using the /ntmserver command. Changes are written back to the file immediately and take effect at runtime without a reload command.

DAMAGE_COMPATIBILITY_MODE

Field	Value
Key	`DAMAGE_COMPATIBILITY_MODE`
Type	Boolean
Default	`false`

Enables a compatibility shim for damage calculations that helps NTM work alongside mods that use non-standard health or damage systems.

Mine damage values (MINE_AP / HE / SHRAP / NUKE / NAVAL)

Key	Mine Type	Default Damage
`MINE_AP_DAMAGE`	Anti-personnel mine	`10.0`
`MINE_HE_DAMAGE`	High-explosive mine	`35.0`
`MINE_SHRAP_DAMAGE`	Shrapnel mine	`7.5`
`MINE_NUKE_DAMAGE`	Nuke mine	`100.0`
`MINE_NAVAL_DAMAGE`	Naval mine	`60.0`

All values are in half-hearts of damage. These can be tuned individually to balance PvP or survival difficulty.

TAINT_TRAILS

Field	Value
Key	`TAINT_TRAILS`
Type	Boolean
Default	`false`

When enabled, tainted entities leave a contamination trail as they move.

CRATE_OPEN_HELD / CRATE_KEEP_CONTENTS

Key	Description	Default
`CRATE_OPEN_HELD`	Whether crates can be opened while held in hand	`true`
`CRATE_KEEP_CONTENTS`	Whether crates retain their contents when broken	`true`

ITEM_HAZARD_DROP_TICKRATE

Field	Value
Key	`ITEM_HAZARD_DROP_TICKRATE`
Type	Integer
Default	`2`

How frequently (in ticks) hazardous dropped items are evaluated for their environmental effects. Lower values increase responsiveness at the cost of more frequent checks.

ENABLE_MKU

Field	Value
Key	`ENABLE_MKU`
Type	Boolean
Default	`true`

Enables the MKU (a specific weapon system). Disable to prevent players from using it.

STRUCTURE_DEBUG

Field	Value
Key	`STRUCTURE_DEBUG`
Type	Boolean
Default	`false`

Enables debug logging for structure generation. Useful when diagnosing why structures are or aren’t spawning.

AUTOCAL_MAX_CLOCK

Field	Value
Key	`AUTOCAL_MAX_CLOCK`
Type	Integer
Default	`20`

Maximum clock rate (in ticks) for the auto-calibration system. Controls how frequently automatic calibration routines are allowed to run.

Introduction

Core Concepts

Configuration

NTM Machine, World and Server Configuration Reference

Machine Config — `09_machines`

Weapon Config

Bomb Config — Explosion Radii & Blast Parameters

World Config — Ore Generation

World Config — Structure & Event Frequencies

Server Config — `hbmServer.json`

Build docs developers (and LLMs) love

Introduction

Core Concepts

Configuration

Documentation Index

​Machine Config — 09_machines

​Weapon Config

​Bomb Config — Explosion Radii & Blast Parameters

​World Config — Ore Generation

​World Config — Structure & Event Frequencies

​Server Config — hbmServer.json

Build docs developers (and LLMs) love

Machine Config — `09_machines`

Weapon Config

Bomb Config — Explosion Radii & Blast Parameters

World Config — Ore Generation

World Config — Structure & Event Frequencies

Server Config — `hbmServer.json`