#wallpaper {
position:fixed;
top:0;
left:0;
height:100%;
width:100%;
z-index:-9;
}
#wallpaperBackground {
position:absolute;
top:0;
right:0;
bottom:0;
left:0;
width:100%;
height:100%;
}
#wallpaperForeground {
position:absolute;
top:0;
right:0;
bottom:0;
left:0;
width:100%;
height:100%;
background:url(../img/baseSOLID.png;
opacity:0.05;
filter:alpha(opacity=05);
}

note:background-repeat:repeat;