---
title: entityIndexInLightmapResource
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lightmapcomponent/entityindexinlightmapresource
---

# entityIndexInLightmapResource

A dictionary mapping the descendants of the LightmapComponent-holding entity to their corresponding slot in the Lightmap resource.

## Declaration

```swift
var entityIndexInLightmapResource: [Entity : LightmapComponent.EntityIndex]
```

## See Also

### Mapping entities to the lightmap

- [LightmapComponent.EntityIndex](realitykit/lightmapcomponent/entityindex.md)