Meteor Material Registry

The Meteor Material Registry is a shared list of grindable materials that Neroland Core keeps for the whole ecosystem. Machines that turn something into a random Nero material — first of all the Nerospace meteor grinder — read this list instead of hard-coding their own. Any mod (or you, with a datapack) can add a material to it, and the odds rebalance automatically.

Core itself does not add a grinder — it owns the list. You will see this list in action through mods that consume it, such as Nerospace.

What's in the list by default#

Core ships its four base materials:

Other mods add their own (planet ores, exotic drops, …). If a mod isn't installed, its entries simply aren't there — nothing breaks.

How the odds work#

Each material has a rarity tier that sets its base weight, and the grinder picks one at random in proportion to those weights — but only from the materials you've actually unlocked. As you progress and more materials become eligible, the common ones naturally become rarer, with no fixed tables anywhere.

Worked through with Core's materials:

• Before reaching orbit: Nero Alloy Dust ~70.6%, Plasma Glass ~29.4%.
• After reaching orbit: ~49.2% / 20.5% / 20.5% / 9.8% across the four.
• On a colony planet (with a planet-bound ore): the local ore joins the pool with a bias, diluting the rest further; off that planet it disappears again.

There's also a small separate chance (8% by default) for a bonus exotic drop from mods that register exotic materials.

Tuning it (server owners)#

The levers live in Core's config (config/nerolandcore.properties) and apply after /neroland config reload:

• meteorTierBaseWeightCommon / …Uncommon / …Rare — the base weights (default 60 / 25 / 12).
• meteorPlanetBias — how strongly a planet favours its own ore (default 2.0).
• meteorExoticChance — the exotic bonus chance per grind (default 0.08).

Inspect the live list in-game with /neroland meteor list, and re-read material files with /neroland meteor reload (operator only). See Commands and Configuration.

Adding or changing materials with a datapack#

Drop one JSON per material in a datapack at data/<your_namespace>/neroland/meteor_materials/<id>.json:

{
  "item": "yourmod:cobalt_dust",
  "tier": "uncommon",
  "min_gate": "nerolandcore:reached_orbit",
  "planet": null,
  "weight_override": null,
  "enabled": true
}

• tier is one of common, uncommon, rare, exotic (exotic entries must set a weight_override).
• min_gate is a progression gate id, or null for "always".
• planet binds the material to one dimension (a Nerospace planet id), or null for anywhere.
• To retune an existing material, ship a file at the same path in a higher-priority datapack — you only need to include the fields you want to change; the rest are kept. An explicit null clears a field.

Membership for recipe viewers is the tag neroland:meteor/grindable; add your item there too if you want it recognised as grindable by JEI/REI and compat layers.

Mod authors can instead annotate items in code with @GrindableMaterial — see the developer docs.

Privacy#

The registry is just item metadata — it stores nothing about players, so there's nothing to export or erase. See Privacy & Data.