#model{
    width: 100%;
    height: 200%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
  }

  #model, canvas {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    outline: none;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0); /* mobile webkit */
  }