I've made up some die-cut decoupage - this Hunkydory sheet to be precise. I decided to be a smart ar5e & converted it to a shaker card (well, topper ATM, I haven't mounted it on a card yet!) by making an acetate sandwich with the last 2 layers, like you would if you made invertage into a shaker topper.
It took a bit of engineering & glitter (to hide the foam tape), but the result is rather lovely if I do say so myself :D
BUT - the side view is pretty ugly as it's not an even view of the foam pads & tapes used to build up the image as it would be if it were regular invertage & I'm stuck on how to disgise it.
If I get chance tomorrow, I'll try & post pics to illustrate what I mean.
The only thought I have ATM is some kind of 3D frame to set the topper inside, but that could end up quite fiddly...Hmmm...