You've seen fixed, how about animated?

Web Studio Next

See custom coding for full bg's like this example

Put this in the HEAD

<script type="text/javascript" src=""></script>

<style type="text/css"> .clouds {background:url($thisfolderurl$bg_clouds.png) repeat 0 bottom;position:absolute;top:0;left:0;z-index:0;width:100%; height:100%;} </style>

<script type="text/javascript"> var scrollSpeed = 70;var current = 0;var direction = 'h';function bgscroll(){current -= 1; $('div.clouds').css("backgroundPosition", (direction == 'h') ? current+"px 0" : "0 " + current+"px");} setInterval("bgscroll()", scrollSpeed); </script>

Download and attach the image to an HTML object, then put this inside of it.

<div class="clouds"></div>

Stretch the HTML object to size you want the animated clouds, your page is the background color

How to do this in an HTML object