Model Format (Resource Pack)

Location: "mypack:my_model/main" = assets/mypack/models/entity/my_model/main.json

Entity models are used for automobile part rendering, and are referenced in model definitions.
Support for JSON-defined entity models is provided by JsonEM.

Example:

{
    "texture": {
        "width": 64,
        "height": 64
    },
    "bones": {
        "cube": {
            "transform": {
                "origin": [0, 0, 0]
            },
            "cuboids": [
                {
                    "uv": [0, 0],
                    "offset": [-6, 12, -6],
                    "dimensions": [12, 12, 12]
                }
            ]
        }
    }
}

Create Your Own Model (Blockbench)

You can create your own custom model files using the software Blockbench and a custom plugin.
After installing Blockbench, visit the JsonEM README for instructions on installing the JsonEM plugin.