---
title: parameterMapping
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lowlevelmaterialresource/lightingfunction/parametermapping
---

# parameterMapping

The parameter name-to-slot mapping for this lighting function.

## Declaration

```swift
final var parameterMapping: LowLevelMaterialParameterMapping? { get }
```

## See Also

### Configuring shader arguments

- [argumentTableDescriptor](realitykit/lowlevelmaterialresource/lightingfunction/argumenttabledescriptor.md)