Why some photos are hard
Automatic tools guess which pixels belong to the subject. Thin hair strands, glass, smoke and subjects that look like the background make that guess uncertain.
Improve the photo first
Use even daylight, avoid shadows on the background and keep a clear colour difference between subject and backdrop. Take the photo at the highest resolution your phone allows.
Use the brushes
In the background remover, choose Restore to paint back parts that were cut away, such as thin chains or hair, and Erase to remove leftover background. Make the brush smaller for fine areas.
Adjust Edge and Smooth
Move Edge left to remove a halo, right to include more of the outline. Smooth softens a jagged edge. Turn on Remove specks and loose shadows if small bits remain.
Choose a background that hides flaws
Light grey or a mid colour hides small edge errors better than pure white or black. For hair, a soft background colour that matches the original scene looks more natural.
Know the limit
For a wedding portrait or a big print, a paid cloud tool or a professional editor will give better hair detail. For online listings, profile pictures and social posts, a touched-up result from this tool is usually enough.