{
  "elements": [
    {
      "from": [ 0, 0, 0 ],
      "to": [ 16, 16, 16 ],
      "faces": {
        "down":  { "texture": "#down", "cullface": "down" },
        "up":    { "texture": "#up0", "cullface": "up" },
        "north": { "texture": "#north0", "cullface": "north" },
        "south": { "texture": "#south0", "cullface": "south" },
        "west":  { "texture": "#west0", "cullface": "west" },
        "east":  { "texture": "#east0", "cullface": "east" }
      }
    },
    {
      "from": [ 0, 0, 0 ],
      "to": [ 16, 16, 16 ],
      "faces": {
        "down":  { "texture": "#down1", "cullface": "down" },
        "up":    { "texture": "#up1", "cullface": "up" },
        "north": { "texture": "#north1", "cullface": "north" },
        "south": { "texture": "#south1", "cullface": "south" },
        "west":  { "texture": "#west1", "cullface": "west" },
        "east":  { "texture": "#east1", "cullface": "east" }
      }
    }
  ]
}

{
  "elements": [
    {
      "from": [ 0, 0, 0 ],
      "to": [ 16, 16, 16 ],
      "faces": {
        "down":  { "texture": "#down0", "cullface": "down" },
        "up":    { "texture": "#up0", "cullface": "up" },
        "north": { "texture": "#north0", "cullface": "north" },
        "south": { "texture": "#south0", "cullface": "south" },
        "west":  { "texture": "#west0", "cullface": "west" },
        "east":  { "texture": "#east0", "cullface": "east" }
      }
    },
    {
      "from": [ 0, 0, 0 ],
      "to": [ 16, 16, 16 ],
      "faces": {
        "down":  { "texture": "#down1", "cullface": "down" },
        "up":    { "texture": "#up1", "cullface": "up" },
        "north": { "texture": "#north1", "cullface": "north" },
        "south": { "texture": "#south1", "cullface": "south" },
        "west":  { "texture": "#west1", "cullface": "west" },
        "east":  { "texture": "#east1", "cullface": "east" }
      }
    }
  ]
}

Fix down side of double layered blocks not showing
Fix down side of double layered blocks not showing
