minecraft-assets/assets/minecraft/blockstates/waterlily.json

{
    "variants": {
        "normal": [
            { "model": "waterlily" },
            { "model": "waterlily", "y": 90 },
            { "model": "waterlily", "y": 180 },
            { "model": "waterlily", "y": 270 }
        ]
    }
}