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# DiffuseLightProbeGroupComponent

A component that stores diffuse probe data for a spatial region.

```
struct DiffuseLightProbeGroupComponent
```

## Overview

Attach this component to an entity to designate it as a diffuse probe group — a positioned
source of baked diffuse lighting. Other entities can reference this group via
[`DiffuseLightProbeReceiverComponent`](/documentation/RealityKit/DiffuseLightProbeReceiverComponent) to receive spatially-varying diffuse illumination.

This follows the same source/receiver pattern as
`ImageBasedLightComponent` / `ImageBasedLightReceiverComponent`.

```swift
let probeGroup = Entity()
probeGroup.components[DiffuseLightProbeGroupComponent.self] =
    DiffuseLightProbeGroupComponent(resource: probeResource)
```

## See Also

[`DiffuseProbeResource`](/documentation/RealityKit/DiffuseProbeResource)

A resource containing baked diffuse lighting data organized as a tetrahedral probe mesh.

[`DiffuseLightProbeReceiverComponent`](/documentation/RealityKit/DiffuseLightProbeReceiverComponent)

A component that receives diffuse lighting from a referenced probe group.


---

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