# SceneWind

> Talos 0.7 · Since 0.7

The scene's wind: a steady speed along a bearing plus optional seeded gusts, a pure function of position and simulation time.

## Fields

| Field | Type | Required | Default | Allowed values | Description |
|---|---|---|---|---|---|
| `speedMps` | `number` | no |  |  | Steady wind speed, m/s, 0..100. Default 0 (still air). Outside is clamped (`air-out-of-range`). |
| `directionRad` | `number` | no | `0` |  | Compass bearing the wind blows toward, radians, as `sky.clouds.windDirectionRad`: 0 toward -Z, increasing toward +X. Default 0. |
| `gustMps` | `number` | no |  |  | Peak extra speed of a gust along the wind, m/s, 0..50. Default 0 (steady). Gusts are three waves of extra speed at fixed, seeded phases that travel downwind at the mean speed. Outside is clamped (`air-out-of-range`). |
| `gustPeriodS` | `number` | no | `8` |  | Period of the longest gust wave, seconds, 1..120. Default 8. Outside is clamped (`air-out-of-range`). |
| `seed` | `number` | no | `1` |  | A whole number, 0 or more, that places the gusts. Default 1. |