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# maxVertexAmplificationCount

The maximum vertex amplification count you can set when encoding render commands.

```
var maxVertexAmplificationCount: Int { get set }
```

## Discussion

Before setting this property, call the [`supportsVertexAmplificationCount(_:)`](/documentation/Metal/MTLDevice/supportsVertexAmplificationCount(_:)) method on the device object to determine whether that amplification count is supported.

## See Also

[`setVertexAmplificationCount(_:viewMappings:)`](/documentation/Metal/MTLRenderCommandEncoder/setVertexAmplificationCount(_:viewMappings:))

Configures the number of output vertices the render pipeline produces for each input vertex, optionally with render target and viewport offsets.

[`supportsVertexAmplificationCount(_:)`](/documentation/Metal/MTLDevice/supportsVertexAmplificationCount(_:))

Returns a Boolean value that indicates whether the GPU supports an amplification factor.


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