NaturesAura/src/main/resources/assets/naturesaura/blockstates/ancient_sapling.json

{
    "forge_marker": 1,
    "defaults": {
        "model": "minecraft:cross",
        "textures": {
            "cross": "naturesaura:blocks/ancient_sapling"
        },
        "transform": "forge:default-block"
    },
    "variants": {
        "normal": [{}],
        "inventory": [
            {
                "model": "builtin/generated",
                "transform": "forge:default-item",
                "textures": {
                    "layer0": "naturesaura:blocks/ancient_sapling"
                }
            }
        ],
        "stage": {
            "0": {},
            "1": {}
        }
    }
}