{
    "variants": {
        "facing=north,lit=false": { "model": "block/furnace" },
        "facing=south,lit=false": { "model": "block/furnace", "y": 180 },
        "facing=west,lit=false":  { "model": "block/furnace", "y": 270 },
        "facing=east,lit=false":  { "model": "block/furnace", "y": 90 },
        "facing=north,lit=true": { "model": "block/furnace_on" },
        "facing=south,lit=true": { "model": "block/furnace_on", "y": 180 },
        "facing=west,lit=true":  { "model": "block/furnace_on", "y": 270 },
        "facing=east,lit=true":  { "model": "block/furnace_on", "y": 90 }
    }
}