Inpainting and Outpainting
Painting over a selected region, and extending the canvas past its edges. Between them they solve most of the problems you'd otherwise reroll for — and they are available in every serious tool, including Photoshop.
Inpainting — mask an area, describe what should be there, regenerate only that area.
- Fixing a bad hand, a wrong expression, a duplicated object
- Removing something you don't want, or adding something you do
- Changing one element — a garment, a sign, a product — while everything else stays identical
- Practical tip: feather your mask generously and include some surrounding context in the selection. Tight masks produce visible seams.
Outpainting — extend the image beyond its original frame.
- Turning a square into a banner, or a portrait crop into a landscape
- Recovering headroom the original composition didn't leave you
- Building a wide environment from a single strong central image
- Practical tip: extend in modest steps rather than one huge jump, and re-anchor with a prompt each time. Big extensions drift into a different scene.