Iris-Pack-Overworld/biomes/cave/red-sandstone-cavern.json

{
    "wall": {
        "palette": [
            {
                "block": "minecraft:smooth_red_sandstone"
            }
        ]
    },
    "layers": [
        {
            "maxHeight": 2,
            "minHeight": 2,
            "palette": [
                {
                    "block": "minecraft:smooth_red_sandstone"
                }
            ]
        }
    ],
    "caveCeilingLayers": [
        {
            "maxHeight": 2,
            "minHeight": 2,
            "palette": [
                {
                    "block": "minecraft:smooth_red_sandstone"
                }
            ]
        }
    ]
}