# Known Limitations

## Unity

### Version

Lumen requires the use of Unity 6000.0 _or higher_. Projects that require older Unity versions should remain using Lumen 1.&#x20;

### Render Pipelines

Lumen is URP **only** and does not support HDRP or BiRP.

### Best Practices

Use the project setup wizard (Window/Lumen Setup) to setup your project settings for the best results

## Lumen

### Fake Lights

Lumen's fake lights do not support shadow casting or lighting transparent objects

For the fake lights to work, the depth normals texture must be written to. This can be accomplished by adding the LumenRendererFeature to your URP renderer asset if  no other renderer feature uses depth normals. Most notably, this is not required if using SSAO in your project!
