{
	"feature": "tfc:cave_column",
	"placement": [
		{
			"type": "tfc:carving_mask",
			"step": "air",
			"min_y": {
				"above_bottom": 25
			}
		},
		{
			"type": "minecraft:rarity_filter",
			"chance": 60
		}
	]
}