{
  "variants":
  {
    "half=top,metal=lumium": { "model": "substratum:slabTopLumium"  },
    "half=top,metal=enderium": { "model": "substratum:slabTopEnderium"  },
    "half=bottom,metal=lumium": { "model": "substratum:slabBottomLumium"  },
    "half=bottom,metal=enderium": { "model": "substratum:slabBottomEnderium"  }
  }
}

