body {
background-image: url("http://escapec001.local/test/test.jpg");
}
now the outline of the screen shows the image. but the node covers it in black
is it possible to set the background of the template node transparant so you see the background image?
Use your browser's developer tools, click on the select element button and select one of the lines. You will see the CSS selector that will change it. Mess with the CSS directly in the browser until you get the effect you want (also a good way to learn about CSS).