---
title: mappingChannel
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scnmaterialproperty/mappingchannel
---

# mappingChannel

The source of texture coordinates for mapping the material property’s image contents.

## Declaration

```swift
var mappingChannel: Int { get set }
```

## Discussion

Discussion A geometry can have multiple independent sources of texture coordinates, each of which defines a unique mapping channel number. You can use these channels to map different visual properties of a material in different ways. For example, a geometry representing a picture frame might use one set of texture coordinates for mapping the materials of the frame itself, and another set of texture coordinates for placing a picture into the frame. For information about creating geometries with multiple texture mapping channels, see SCNGeometry.

## See Also

### Configuring Texture Mapping Attributes

- [contentsTransform](scenekit/scnmaterialproperty/contentstransform.md)
- [wrapS](scenekit/scnmaterialproperty/wraps.md)
- [wrapT](scenekit/scnmaterialproperty/wrapt.md)
- [SCNWrapMode](scenekit/scnwrapmode.md)
- [minificationFilter](scenekit/scnmaterialproperty/minificationfilter.md)
- [magnificationFilter](scenekit/scnmaterialproperty/magnificationfilter.md)
- [mipFilter](scenekit/scnmaterialproperty/mipfilter.md)
- [SCNFilterMode](scenekit/scnfiltermode.md)
- [maxAnisotropy](scenekit/scnmaterialproperty/maxanisotropy.md)
- [borderColor](scenekit/scnmaterialproperty/bordercolor.md)