MCMinecraft Assets Explorer

{
    "textures": {
        "particle": "block/nether_portal",
        "portal": "block/nether_portal"
    },
    "elements": [
        {   "from": [ 6, 0, 0 ],
            "to": [ 10, 16, 16 ],
            "faces": {
                "east": { "uv": [ 0, 0, 16, 16 ], "texture": "#portal" },
                "west": { "uv": [ 0, 0, 16, 16 ], "texture": "#portal" }
            }
        }
    ]
}