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# materials

The material used to render each graph output, keyed by output node identifier.

```
var materials: [ComputeNodeGraph.NodeID : any Material] { get set }
```

## Discussion

Assigning a [`resource`](/documentation/RealityKit/ComputeGraphComponent/resource) initializes this dictionary from the materials the
resource defines for its outputs. Assign a new value to replace them.

---

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