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# triangleFillMode

The object that controls how RealityKit draws triangles.

```
var triangleFillMode: PhysicallyBasedMaterial.TriangleFillMode { get set }
```

## Discussion

A value of [`MaterialParameterTypes.TriangleFillMode.fill`](/documentation/RealityKit/MaterialParameterTypes/TriangleFillMode/fill) causes RealityKit
to draw triangles normally, while a value of  [`MaterialParameterTypes.TriangleFillMode.lines`](/documentation/RealityKit/MaterialParameterTypes/TriangleFillMode/lines)
turns on wireframe rendering.

---

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