回複：good idea~ what about lighting? how to meet the requirement

You can find it USCIS.gov

I recommend the white sheet because sometimes the wall is not as white as you thought

You should have more than one light because you don't want to have any shades on the photo

Maybe you can also try natural light outside.

you can have many versions and print it at walmart. When you pick up, you can ask them to cut for you. I have it cut at my company's copy room