BetterLeavesLite/assets/twilightforest/blockstates/fallen_leaves.json

{
    "variants": {
        "": [
            {
                "model": "twilightforest:block/fallen_leaves"
            },
            {
                "model": "twilightforest:block/fallen_leaves",
                "y": 90
            },
            {
                "model": "twilightforest:block/fallen_leaves",
                "y": 180
            },
            {
                "model": "twilightforest:block/fallen_leaves",
                "y": 270
            }
        ]
    }
}