Creating custom armor

Custom armor requires an entity equipment "model" json in your resource-pack as well as 2 textures and the minecraft:equippable component.

Model and textures

The model json should be located in assets/<namespace>/equipment/<name>.json with the following contents:

{
  "layers": {
    "humanoid": [
      {
        "texture": "<namespace>:<texture-name>"
      }
    ],
    "humanoid_leggings": [
      {
        "texture": "<namespace>:<texture-name>"
      }
    ]
  }
}

The humanoid entry is used for the helmet and chestplate, humanoid_leggings for leggings and boots.

While this tutorial focuses on humanoid armor worn by players and other humanoid mobs, you can also create custom armor /harnesses for happy ghasts, wolf armor, elytras, and more. See the vanilla model files as reference.

The location of the textures is partially based on the layers of the model json: assets/<namespace>/textures/entity/<layer-name>/<texture-name>.png

Let's use this json as example (assets/mynamespace/equipment/obsidian.json):

{
  "layers": {
    "humanoid": [
      {
        "texture": "mynamespace:obsidian"
      }
    ],
    "humanoid_leggings": [
      {
        "texture": "mynamespace:obsidian"
      }
    ]
  }
}

In this case the game expect the textures to be located in:

assets/mynamespace/textures/entity/humanoid/obsidian.png

and

assets/mynamespace/textures/entity/humanoid_leggings/obsidian.png

See the vanilla texture files as reference.

You will also need an icon for the item itself.

Filament json

The filament item json will need the minecraft:equippable and attribute modifiers. We will use the name of the json file and our namespace as the asset_id; mynamespace:obsidian will use the file assets/mynamespace/equipment/obsidian.json

{
  "id": "server:obsidian_chestplate",
  "vanillaItem": "iron_chestplate",
  "itemTags": ["chest_armor"],
  "translations": {
    "en_us": "Obsidian Chestplate"
  },
  "item_resource": {
    "parent": "item/generated",
    "textures": {
      "default": {
        "layer0": "mynamespace:item/obsidian_set/obsidian_chestplate"
      }
    }
  },
  "behaviour": {
    "generate_trim_models": {}
  },
  "components": {
    "attribute_modifiers": [
      {
        "type": "armor",
        "amount": 6,
        "id": "armor.chestplate",
        "operation": "add_value",
        "slot": "chest"
      },
      {
        "type": "armor_toughness",
        "amount": 0,
        "id": "armor.chestplate",
        "operation": "add_value",
        "slot": "chest"
      }
    ],
    "break_sound": "entity.item.break",
    "damage": 0,
    "enchantable": {
      "value": 6
    },
    "equippable": {
      "asset_id": "mynamespace:obsidian",
      "equip_sound": "item.armor.equip_iron",
      "slot": "chest"
    },
    "max_damage": 210,
    "max_stack_size": 1,
    "rarity": "common",
    "repair_cost": 0
  }
}

You can look-up the default components of vanilla items here

The generate_trim_models behaviour will automatically generate the item models for the different armor trims and add them to the resource-pack.