.maincontent_wrapper {
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    background-image: linear-gradient( 180deg,rgba(255,255,255,.8) 0%,rgba(255,255,255,.8) 100%) , url(/imageserver/Textures/testPattern.png);
}