body {
    margin: 0;
    overflow: hidden;
    background-image: url('/textures/BG.png');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100% 100%;
    display: flex;
}

#Scene {
    position: absolute;
    width: 100vw;
    height: 100vh;
    z-index: 10; /* über Navbar */
}

#Scene canvas {
    display: block;
}