> ## 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

```typescript theme={null}
import { ImageGenerationRequestBackground } from "@openrouter/sdk/models";

let value: ImageGenerationRequestBackground = "auto";

// Open enum: unrecognized values are captured as Unrecognized<string>
```

## Values

```typescript theme={null}
"auto" | "transparent" | "opaque" | Unrecognized<string>
```