{
    "feature": {
        "type": "minecraft:multiface_growth",
        "config": {
            "block": "glow_lichen",
            "can_be_placed_on": [
                "clay",
                "stone",
                "deepslate",
                "andesite"
            ],
            "can_place_on_ceiling": true,
            "can_place_on_floor": true,
            "can_place_on_wall": true,
            "chance_of_spreading": 0.3,
            "search_range": 2
        }
    },
    "placement": [
        {
            "type": "minecraft:count_on_every_layer",
            "count": 20
        },
        {
            "type": "minecraft:environment_scan",
            "direction_of_search": "down",
            "max_steps": 1,
            "target_condition": {
                "type": "minecraft:all_of",
                "predicates": [
                    {
                        "type": "minecraft:matching_blocks",
                        "blocks": [
                            "minecraft:air"
                        ],
                        "offset": [
                            0,
                            1,
                            0
                        ]
                    },
                    {
                        "type": "minecraft:matching_blocks",
                        "blocks": [
                            "minecraft:air"
                        ]
                    },
                    {
                        "type": "minecraft:matching_blocks",
                        "blocks": [
                            "minecraft:clay"
                        ],
                        "offset": [
                            0,
                            -1,
                            0
                        ]
                    }
                ]
            }
        },
        {
            "type": "minecraft:biome"
        }
    ]
}