Set image as background in CMS Made Simple?

Question

CMS

I started implementing the template in CMS Made Simple.
Did according to the manual .
Unfortunately, the point-blank image does not want to appear on the page, although the correct URL is given in the code before it.

Answer 1

Solution: Use background:url
() instead of background-image:url ()

Answer 2

Tried both options.
In the page code, it shows the normal path to the image, but it is not displayed.
Tried to manually enter the url, still does not show.
Somewhere even googled this option

/images/

and then

background-image:url([[$my_path]]background.jpg)

Still doesn't work

Answer 3

Now in style:

background-image:url([[root_url]]/uploads/images/background.jpg) no-repeat center center fixed;

The browser issues

background-image:url(http://test.lan/uploads/images/background.jpg) no-repeat center center fixed;

Image at this address exists but is not displayed

Answer 4

For the sake of self-education, can anyone explain the fundamental difference between background-image:url () and background:url () ?