(1.21.5) Missing texture after adding armor trim to custom armor

[Lea-Reift]

Description

Greetings. I recently started mod development, and I started with fabric. I'm studying it with Kaupenjoe's video series (intended for version 1.21.1, although there were breaking changes, the syntax is almost the same). I'm in the part of creating custom armors, and they work fine in the base state, but after adding a blacksmithing template, the design is displayed correctly in the game, but the item in the inventory shows the missing texture icon (pink and black mozaic).

I updated the texture references and applied the changes for the new versions (create files resources/assets/minecraft/atlases/armor_trims.json and resources/assets/tutorialmod/equipment/pink_garnet.json).

Also, I am using DataGen to generate the other resources:

        itemModelGenerator.registerArmor(
                ModItems.PINK_GARNET_CHESTPLATE,
                RegistryKey.of(EquipmentAssetKeys.REGISTRY_KEY, TutorialMod.getIdentifierForModAsset("pink_garnet")),
                TutorialMod.getIdentifierForModAsset("pink_garnet_chestplate"),
                false
        );

        itemModelGenerator.registerArmor(
                ModItems.PINK_GARNET_LEGGINGS,
                RegistryKey.of(EquipmentAssetKeys.REGISTRY_KEY, TutorialMod.getIdentifierForModAsset("pink_garnet")),
                TutorialMod.getIdentifierForModAsset("pink_garnet_leggings"),
                false
        );

        itemModelGenerator.registerArmor(
                ModItems.PINK_GARNET_BOOTS,
                RegistryKey.of(EquipmentAssetKeys.REGISTRY_KEY, TutorialMod.getIdentifierForModAsset("pink_garnet")),
                TutorialMod.getIdentifierForModAsset("pink_garnet_boots"),
                false
        );

What would be the change I am missing?

[haykam821]

Your item model appears to be working correctly, since the model appears flat in your hand. Are you sure that the texture reference for that item model is correct?

[Lea-Reift]

I added an armor material, but not a trim material. Amethyst is already native on MC.
My asset file generated/assets/tutorialmod/items/pink_garnet_helmet.json is generated correcty.

{
  "model": {
    "type": "minecraft:select",
    "cases": [
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_quartz_trim"
        },
        "when": "minecraft:quartz"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_iron_trim"
        },
        "when": "minecraft:iron"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_netherite_trim"
        },
        "when": "minecraft:netherite"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_redstone_trim"
        },
        "when": "minecraft:redstone"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_copper_trim"
        },
        "when": "minecraft:copper"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_gold_trim"
        },
        "when": "minecraft:gold"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_emerald_trim"
        },
        "when": "minecraft:emerald"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_diamond_trim"
        },
        "when": "minecraft:diamond"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_lapis_trim"
        },
        "when": "minecraft:lapis"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_amethyst_trim"
        },
        "when": "minecraft:amethyst"
      },
      {
        "model": {
          "type": "minecraft:model",
          "model": "tutorialmod:item/pink_garnet_helmet_resin_trim"
        },
        "when": "minecraft:resin"
      }
    ],
    "fallback": {
      "type": "minecraft:model",
      "model": "tutorialmod:item/pink_garnet_helmet"
    },
    "property": "minecraft:trim_material"
  }
}

[haykam821]

What trim material are you applying to your items that causes the missing texture to appear? What does the model tutorialmod:item/pink_garnet_helmet_<trim material>_trim look like for that trim material?

[Lea-Reift]

Lapiz. tutorialmod:item/pink_garnet_helmet_lapis_trim. the model generated/assets/tutorialmod/models/item/pink_garnet_helmet_lapis_trim.json content is as follows:

{
  "parent": "minecraft:item/generated",
  "textures": {
    "layer0": "tutorialmod:item/pink_garnet_helmet",
    "layer1": "tutorialmod:pink_garnet_lapis"
  }
}

[haykam821]

Your item model should look like the following:

{
	"parent": "minecraft:item/generated",
	"textures": {
		"layer0": "tutorialmod:item/pink_garnet_helmet",
		"layer1": "minecraft:trims/items/helmet_trim_lapis"
	}
}

In the data generator, you should use ItemModelGenerator.CHESTPLATE_TRIM_ID_PREFIX instead of TutorialMod.getIdentifierForModAsset("pink_garnet_chestplate"), for example.

[Lea-Reift]

Thank you so much. I've been dealing with this for almost a day. Fabric Team must update the docs to 1.21.5 if is already using it in the template