Create a mask and use The Wall as content? Mmm, here is how you may have an interesting interaction with The Wall. All the characteristics you have in a traditional wall... masked.
Snippet code Html
var images = [ "url1", "url2", "url3", ... "url9" ]; // Define The Wall var wall = new Wall({ "target":"wall", "draggable":true, "autoposition":true, "slideshow": true, "handle":"overlay", "inertia":true, "width":600, "height":600, "rangex":[0,10], "rangey":[0,1], callOnUpdate: function(items){ items.each(function(e, i){ e.node.setStyle("background", "url("+images[e.y]+") no-repeat center center"); }) } });