> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ImageGenerationRequestBackground

Background treatment. `transparent` requires an output\_format that supports alpha (png or webp).

## Example Usage

```python theme={null}
from openrouter.components import ImageGenerationRequestBackground

# Open enum: unrecognized values are captured as UnrecognizedStr
value: ImageGenerationRequestBackground = "auto"
```

## Values

This is an open enum. Unrecognized values will not fail type checks.

* `"auto"`
* `"transparent"`
* `"opaque"`