# BC5

> Compressed two-channel (RG) texture format.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.6/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
BC5 = 27
```

### Remarks

BC5 format compresses textures to 8 bits per pixel, keeping only the red and green color channels. It is widely supported on PC and console platforms.

It is a good format to compress two-channel textures, e.g. as a compression format for tangent space normal maps or velocity fields. For one channel textures, see [TextureFormat.BC4](/engine/6000.6/script-reference/unityengine/textureformat/bc4.md).

Additional Resources: [Texture2D.format](/engine/6000.6/script-reference/unityengine/texture2d/format.md), [texture assets](/engine/6000.6/manual/materials-and-shaders/textures/textures-getting-started/textures.md).