<!--
{
  "availability" : [
    "iOS: 9.0.0 -",
    "iPadOS: 9.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.11.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "ModelIO",
  "identifier" : "/documentation/ModelIO/MDLMaterial/materialFace",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Model I/O"
    ],
    "preciseIdentifier" : "c:objc(cs)MDLMaterial(py)materialFace"
  },
  "title" : "materialFace"
}
-->

# materialFace

The surface of an object.

```
var materialFace: MDLMaterialFace { get set }
```

## Discussion

Determines if the material is front-facing, back-facing, or double-sided. The default case of a [`materialFace`](/documentation/ModelIO/MDLMaterial/materialFace) is [`MDLMaterialFace.front`](/documentation/ModelIO/MDLMaterialFace/front). For more information, see [`MDLMaterialFace`](/documentation/ModelIO/MDLMaterialFace).

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)