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[Home](./index.md) &gt; [@three3d/volume](./volume.md) &gt; [ExampleVolumeMaterial\_1Options](./volume.examplevolumematerial_1options.md) &gt; [threshold](./volume.examplevolumematerial_1options.threshold.md)

## ExampleVolumeMaterial\_1Options.threshold property

渲染最低阈值

**Signature:**

```typescript
threshold?: number | null;
```

## Remarks

只对 ISO 样式有效；

当三维纹理中的值低于该值时，不会被渲染，即视为空

