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

# parameterMapping

The parameter name-to-slot mapping for this function, used to look up binding indices by name at runtime.

## Declaration

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

## See Also

### Configuring the function

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