In external style sheets of my current JSF project, there are hard-coded links to external resources like
.someId { background-image:url(/context/resources/i
I put the CSS images always in a subfolder of the CSS folder. E.g.
This way you just end up like
.someId { background-image:url(images/example.jpg); }
Yes, they are resolved relative to the URL of the CSS file itself, not to the main JSF/HTML page.