What is Snow Stack? A new 3D CSS Visual Effects demo using pure HTML, WebKit’s 3D CSS Effects extensions and JavaScript. You can now see Snow Stack’s live demo if you have Snow Leopard and Safari. On Leopard, you can use WebKit nightly build 45754 or later for a slightly slower experience. Instructions Click here to open the Snow Stack live demo. Arrow keys to move, “Space” to toggle magnify mode.