ActuallyAdditions/src/main/resources/assets/actuallyadditions/blockstates/blockquartzwall.json

{
  "multipart": [
    {   "when": { "up": "true" },
      "apply": { "model": "actuallyadditions:blockquartzwallpost" }
    },
    {   "when": { "north": "true" },
      "apply": { "model": "actuallyadditions:blockquartzwallside", "uvlock": true }
    },
    {   "when": { "east": "true" },
      "apply": { "model": "actuallyadditions:blockquartzwallside", "y": 90, "uvlock": true }
    },
    {   "when": { "south": "true" },
      "apply": { "model": "actuallyadditions:blockquartzwallside", "y": 180, "uvlock": true }
    },
    {   "when": { "west": "true" },
      "apply": { "model": "actuallyadditions:blockquartzwallside", "y": 270, "uvlock": true }
    }
  ]
}