hello again! i tried what you said but it only helped the right side of the blog vs the left, which is where i need the background to cover. if you'd like, i can send you the code that i have already placed and exactly what the problem is!
hello! to make the background of the left side (content portion) of [15] decipher a full background,
1) find #fixedcbg and replace the whole css block with:
#fixedcbg { width: 540px; height: 100%; padding: 90px; position: fixed; z-index: -2; background-image: url({image:content background}); background-attachment: fixed; height: 100%; background-size: cover; {block:ifsidebaronleft} padding: 0; width: 70px; top: 0; left: 0; z-index: 100; {/block:ifsidebaronleft}}
2) find #content and replace the whole css block with:
#content { height: 100%; position: relative; background-size: cover; z-index: 2; {block:ifnotsidebaronleft}background-image: url({image:content background});{/block:ifnotsidebaronleft} background-attachment: fixed; {block:if500pxposts}width: 540px;padding: 90px;{/block:if500pxposts} {block:if400pxposts}width: 440px;padding: 90px 140px;{/block:if400pxposts} {block:ifsidebaronleft} left: 440px; padding: 50px 90px; {/block:ifsidebaronleft}}