On my personal site: http://pavelrozman.com/ the background photo reloads on every refresh with some javascript. Then, I stumbled upon a cool clipping mask tutorial on the web.
h1 {
font-family: Arial;
font-size: 5em;
text-align: center;
background-image: url(Galaxy.jpg);
-webkit-background-clip: text;
background-clip: text;
color: rgba(0,0,0,0);
}
I want to use a random image where it says 'Galaxy.jpg' so that ever refresh there's a new image that is clipped over the text.