String Augmented Reality model rising out of marker

Is it possible to have a model rise up out of a marker?.. if so, please explain how I would do it?

Draw something using this unifycommunity.com so it fits on your framemarker.

Thanks Mike. I managed to get it to work!

For anyone needing help with this, I set the renderqueue to an animated box and set the depthmask shader to a plane that slices through the box.