Live Texture Stitching Example 3:1

{
    "id": "blocks/cracked_stone_bricks",
    "textures": {
        "stonebrick": "blocks/stone_bricks",
        "cracks": "blocks/destroy_stage_6"
    },
    "animation": {
        "frames": [
            {
                "layers": [
                    "#stonebrick",
                    "#cracks"
                ]
            }
        ]
    }
}