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# disableHDR

Disable the high dynamic range post-processing effect.

```
static let disableHDR: ARView.RenderOptions
```

## Discussion

RealityKit applies a high dynamic range effect, along with tone
mapping, as a post-processing step in the GPU during the render.
This effect is computationally inexpensive, but you can add the
[`disableHDR`](/documentation/RealityKit/ARView/RenderOptions-swift.struct/disableHDR) option to the
view’s [`renderOptions`](/documentation/RealityKit/ARView/renderOptions-swift.property) set to turn the
effect off, if needed. Disabling the effect is most useful on older
devices, like those with an A9 processor or earlier.

When deciding whether to use any effect, be sure to consider your
app’s CPU and GPU utilization, as described in
[Improving the Performance of a RealityKit App](/documentation/RealityKit/improving-the-performance-of-a-realitykit-app).

---

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