minecraft-assets/assets/minecraft/blockstates/bamboo_fence.json

{
  "multipart": [
    {
      "apply": {
        "model": "minecraft:block/bamboo_fence_post"
      }
    },
    {
      "apply": {
        "model": "minecraft:block/bamboo_fence_side_north",
        "uvlock": false
      },
      "when": {
        "north": "true"
      }
    },
    {
      "apply": {
        "model": "minecraft:block/bamboo_fence_side_east",
        "uvlock": false
      },
      "when": {
        "east": "true"
      }
    },
    {
      "apply": {
        "model": "minecraft:block/bamboo_fence_side_south",
        "uvlock": false
      },
      "when": {
        "south": "true"
      }
    },
    {
      "apply": {
        "model": "minecraft:block/bamboo_fence_side_west",
        "uvlock": false
      },
      "when": {
        "west": "true"
      }
    }
  ]
}