# hbmspace:chunk_odds

Starts a structure in each chunk with a fixed chance.

Every chunk is a candidate; it starts the set's structure when a random draw seeded from the level seed plus `salt` and the chunk position is below `frequency`. `/locate` finds such structures. Vanilla placement fields such as `exclusion_zone` are ignored.

## Fields

| Field | Meaning and default | Range |
| - | - | - |
| `type` | `hbmspace:chunk_odds`. | |
| `frequency` | Start chance per chunk. | `[0, 1]` |
| `salt` | Seed offset. | `i32` |

## Example

Source path: `data/hbmspace/worldgen/structure_set/electric_volcano.json`

```json
{
  "placement": {
    "type": "hbmspace:chunk_odds",
    "frequency": 0.001,
    "salt": 413018
  },
  "structures": [
    {
      "structure": "hbmspace:electric_volcano",
      "weight": 1
    }
  ]
}
```