I'm trying to load my custom item model (located at <resourcepack>/assets/tesitems/models/item/iron_sword.json), I am using resource pack for fast reloading, but it doesn't work. I don't see any exceptions, so I think model is getting loaded. Here is model code:

{
    "parent": "tesitems:item/handheld",
    "textures": {
        "layer0": "tesitems:items/iron_sword"
    },
    "display": {
        "thirdperson": {
            "rotation": [ 0, 90, -35 ],
            "translation": [ 0, 1.25, -3.5 ],
            "scale": [ 0.85, 0.85, 0.85 ]
        },
        "firstperson": {
            "rotation": [ 0, -135, 25 ],
            "translation": [ 0, 4, 2 ],
            "scale": [ 1.7, 1.7, 1.7 ]
        }
    }
}

, handheld (in the same folder):

{
    "parent": "builtin/generated",
    "display": {
        "thirdperson_righthand": {
            "rotation": [ 0, 90, -35 ],
            "translation": [ 0, 1.25, -3.5 ],
            "scale": [ 0.85, 0.85, 0.85 ]
        },
        "firstperson_righthand": {
            "rotation": [ 0, -135, 25 ],
            "translation": [ 0, 4, 2 ],
            "scale": [ 1.7, 1.7, 1.7 ]
        },
        "thirdperson_lefthand": {
            "rotation": [ 0, 90, -35 ],
            "translation": [ 0, 1.25, -3.5 ],
            "scale": [ 0.85, 0.85, 0.85 ]
        },
        "firstperson_lefthand": {
            "rotation": [ 0, -135, 25 ],
            "translation": [ 0, 4, 2 ],
            "scale": [ 1.7, 1.7, 1.7 ]
        }
    }
}

, registering:

    private static void registerWeapon(Weapon weapon, String name) {
        weapon.setRegistryName(name);
        weapon.setUnlocalizedName(name);
        GameRegistry.register(weapon);
    }

, Weapon extends ItemSword. Texture is in <resourcepack>/assets/tesitems/textures/items/. What had I missed?

Mods are already resource packs, you can build your project in your IDE and then reload resources in-game any time you add/change a resource.

 

There are no

thirdperson

or

firstperson

display transformations in 1.9+ (they were split into left/right hand), so your

iron_sword

model is using the transformations specified by your

handheld

model.

 

Minecraft will automatically load a model for each

Item

, but it won't actually use that model unless you tell it to by calling

ModelLoader.setCustomModelResourceLocation

/

setCustomMeshDefinition

in preInit (only on the client side).

 

If that's not the issue, upload your FML log (logs/fml-client-latest.log) to Gist and link it here. It should tell you what went wrong.

Thanks a lot, it's working now!