---
title: TextureResource.Semantic.normal
framework: realitykit
role: symbol
role_heading: Case
path: realitykit/textureresource/semantic-swift.enum/normal
---

# TextureResource.Semantic.normal

Use the texture to store surface normals.

## Declaration

```swift
case normal
```

## Discussion

Discussion Properties that specify a semantic of normal use the texture to store tangent-space surface normal vectors for use in lighting calculations. Each pixel’s R channel stores the X value from the vector. The G channel stores the Y value from the vector, and the B channel stores the Z value from the vector. All values are between -1.0 and 1.0.

## See Also

### Specifying intended use

- [TextureResource.Semantic.raw](realitykit/textureresource/semantic-swift.enum/raw.md)
- [TextureResource.Semantic.color](realitykit/textureresource/semantic-swift.enum/color.md)
- [TextureResource.Semantic.hdrColor](realitykit/textureresource/semantic-swift.enum/hdrcolor.md)
- [TextureResource.Semantic.scalar](realitykit/textureresource/semantic-swift.enum/scalar.md)