# SceneFogHdVolumetric

> Talos next · Since next

HD's volumetric fog: how many lamps it sees through their shadows, how far it reaches and how much of the previous frame it keeps.

All optional; a scene without them draws the same frame as before.

## Fields

| Field | Type | Required | Default | Allowed values | Description |
|---|---|---|---|---|---|
| `localShadows` | `integer` | no |  |  | HD only: how many lamps per froxel in the fog are seen through their shadows, whole number 0..8, so the light shafts of a lamp stop at walls. Costs one shadow lookup per light per froxel. Default 0: lamps scatter unshadowed. Capped by the quality knob `fog.volumetricLocalShadows`. |
| `distanceM` | `number` | no | `150` |  | HD only: how far from the camera the volumetric fog is computed, metres, 1..10000. Default 150. |
| `historyWeight` | `number` | no | `0` |  | HD only: how much of the previous frame the volumetric fog keeps, 0..0.98. Higher is smoother and lags more. Default 0.9. |