# hbmspace:seismic_crack

Eve seismic cracks.

Columns of the chunk in `biomes` where a noise field exceeds `threshold` are cleared to the bedrock and filled with `depth` blocks of `fill`. Use it with an empty placement list.

## Fields

| Field | Meaning and default | Range |
| - | - | - |
| `domain` | Noise seed domain. | |
| `scale` | Horizontal noise scale. | `f64` |
| `threshold` | Field level above which a crack forms. | `f64` |
| `depth` | Fill depth above the bedrock. | `[0, 64]` |
| `fill` | Fill block. | |
| `fill.id` | Registered block ID. | |
| `fill.properties` (Optional) | Block-state property names and string values. | |
| `biomes` | Biome ID, `#tag` or ID list. | |

The top-level `type` selects this feature; the remaining fields belong beside it.

## Example

Inline feature of `data/hbmspace/worldgen/placed_feature/eve/cracks.json`:

```json
{
  "type": "hbmspace:seismic_crack",
  "biomes": "hbmspace:eve_seismic_plains",
  "depth": 9,
  "domain": "hbmspace:eve/cracks",
  "fill": "minecraft:lava",
  "scale": 0.3,
  "threshold": 0.9
}
```