Iris-Pack-Overworld/generators/dunes.json

{
    "interpolator": {
        "function": "BILINEAR_STARCAST_9",
        "horizontalScale": 20
    },
    "seed": 54654,
    "composite": [
        {
            "seed": 2343,
            "exponent": 5,
            "negative": true,
            "style": {
                "style": "BIOCTAVE_FRACTAL_CUBIC",
                "zoom": 2.2,
                "fracture": {
                    "style": "IRIS_THICK",
                    "zoom": 0.8,
                    "exponent": 0.2,
                    "multiplier": 10
                }
            }
        }
    ]
}