container {

  subsurface {
    child: container {
      color {
        bounds: 0 0 100 100;
        color: black;
      }
      texture {
        texture: url('data:image/svg+xml;utf-8,<svg width="13" height="17"></svg>');
       }
    }
  }

  debug {
    message: "Put something on top, so we switch from above to below";
    child: color {
      bounds: 0 0 10 10;
      color: red;
    }
  }
}