ploof-pack/faithless/assets/minecraft/blockstates/soul_sand.json

{
  "variants": {
    "": [
      { "model": "minecraft:block/soul_sand" },
      { "model": "minecraft:block/soul_sand", "y": 90 },
      { "model": "minecraft:block/soul_sand", "y": 180 },
      { "model": "minecraft:block/soul_sand", "y": 270 }
    ]
  }
}