background image, home page only, div below layer slider

I’ve just updated enfold to latest version (3.02) and lost some customizations due to source code changes (some items carried over in QuickCSS no longer work). One thing I had was a background image on the home page in the div just below the layer slider and before the footer. I can put the background back in the ‘container’ div but it now appears on all pages. So my thought was to duplicate the page template and modify one of them for the home page but looking at the code in page.php it seems to be pulling the part of the page I want to modify from avia files which is where I start scratching my head. I found another post in the forum about this which Yigit marked as duplicate however the original post he linked back to offers no solution which is of course not helpful.