{
    "feature": "terralith:forest/vanilla/fallen_tree_oak",
    "placement": [
        {
            "type": "minecraft:count",
            "count": 1
        },
        {
            "type": "minecraft:rarity_filter",
            "chance": 6
        },
        {
            "type": "minecraft:in_square"
        },
        {
            "type": "minecraft:heightmap",
            "heightmap": "WORLD_SURFACE_WG"
        },
        {
            "type": "minecraft:block_predicate_filter",
            "predicate": {
                "type": "minecraft:matching_blocks",
                "blocks": [
                    "minecraft:grass_block",
                    "dirt"
                ],
                "offset": [
                    0,
                    -1,
                    0
                ]
            }
        },
        {
            "type": "minecraft:biome"
        }
    ]
}