RoundTreesPack/assets/regions_unexplored/blockstates/willow_log.json

{
    "variants": {
        "axis=y": {
            "model": "regions_unexplored:block/willow_log"
        },
        "axis=z": {
            "model": "regions_unexplored:block/willow_log",
            "x": 90,
            "y": 180
        },
        "axis=x": {
            "model": "regions_unexplored:block/willow_log",
            "x": 90,
            "y": 90,
            "z": 90
        }
    }
}