---
title: roughness
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/simplematerial/roughness
---

# roughness

The roughness of the material.

## Declaration

```swift
var roughness: MaterialScalarParameter { get set }
```

## See Also

### Characterizing a material

- [color](realitykit/simplematerial/color.md)
- [baseColor](realitykit/simplematerial/basecolor-swift.property.md)
- [SimpleMaterial.BaseColor](realitykit/simplematerial/basecolor-swift.typealias.md)
- [tintColor](realitykit/simplematerial/tintcolor-6v03h.md)
- [SimpleMaterial.Texture](realitykit/simplematerial/texture.md)
- [metallic](realitykit/simplematerial/metallic.md)