The source background is distracting
Remove or simplify visible room details such as furniture, doors, curtains, posters, shelves, or other objects behind the subject.
The wall color is uneven
Clean up patches, gradients, color casts, or inconsistent wall tones that make the background look less formal.
Shadows affect the portrait
Reduce background shadows and lighting problems that make the passport-style photo look less clean or harder to review.
You need repeat preparation
Families, offices, and photo desks can use consistent background preparation when several passport-style portraits are needed.