I'm a professional Adobe Illustrator user with over 8 years experience but this issue is leaving me stumped. I've created some artwork for the front of a booklet - it uses 3 jpeg textures set to the Luminosity transparency mode, each contained within a clipping mask around the central cube logo. You can see on the screenshot below how it should look. However no matter what I export to, it ends up looking like the jpg! The transparency mode has been completely ignored. Any ideas? I've never had this before.