@hemlockii: Make sure that your wallpaper is:
1) at a location that is readable for ALL users. That means not inside a encrypted home-directory and with permission to be read by all users.
2) It is a valid PNG or JPG image.
Another thing: is it showing a black wallpaper or the default-wallpaper? The default-wallpaper is the image-file with the path
/usr/share/backgrounds/elementaryos-default
Make sure you have such a file if you experience a black background instead of the default-wallpaper.
@hemlockii: Make sure that your wallpaper is:
1) at a location that is readable for ALL users. That means not inside a encrypted home-directory and with permission to be read by all users.
2) It is a valid PNG or JPG image.
Another thing: is it showing a black wallpaper or the default-wallpaper? The default-wallpaper is the image-file with the path backgrounds/ elementaryos- default
/usr/share/
Make sure you have such a file if you experience a black background instead of the default-wallpaper.