MCMinecraft Assets Explorer

{
  "model": {
    "type": "minecraft:condition",
    "on_false": {
      "type": "minecraft:special",
      "base": "minecraft:item/shield",
      "model": {
        "type": "minecraft:shield"
      }
    },
    "on_true": {
      "type": "minecraft:special",
      "base": "minecraft:item/shield_blocking",
      "model": {
        "type": "minecraft:shield"
      }
    },
    "property": "minecraft:using_item"
  }
}