Outpainting

Outpaint enlarges the canvas in any direction and fills the new area by continuing the original image. The original part doesn’t change at all. It’s suited to turning a portrait image into a landscape one, or filling in background that was cropped off.

Basic steps

1. Choose “Outpaint” as the refine mode.
2. Under “Extend by”, choose “Ratio” or “Custom”.
3. The enlarged canvas is previewed on the right; “Show extend area” shows the area to be filled (checkered).
4. Choose the amount of change and press “Redraw”.

Extend by

Option	Description
Ratio	Choose a target aspect ratio (1:1, 4:3, 16:9 and so on) and, under “Original at”, where the original sits (left / center / right, top / center / bottom)
Custom	Enter how many pixels to add on the top, bottom, left and right

Amount of change

Level	Description
Subtle	The extension follows the edge colours more closely; joins reliably but the content is plainer
Moderate	Continues the original and adds new content (recommended)
Strong	The extension is completely redrawn; the richest content, but more likely to not join up

Prompt

The extended area follows the prompt:

• Add what you’d like to see more of (for example sky, sea).
• If an extra person appears beside the subject, try removing the tags that describe the main character.

Large canvases

If the enlarged canvas exceeds about 1.5 megapixels, it is generated smaller and then enlarged, so the extension looks softer. You can add detail afterwards with Upscaling.

Smoother seams

With SDXL-family models you can turn on “Smoother seams” so the extension joins more naturally and unrelated things are less likely to appear (see Inpainting).

Supported models

Every architecture that supports inpainting can outpaint: the SDXL family, Anima, Z-Image, Krea 2, Qwen Image 2.1 and FLUX.