The current setup does have the objects in full 3d motion. The objects are currently just particles being generated by a single plane and are moving up, however, the scale of each object is being dynamically set by an audio source. The plan was to have other objects that would also be moving around the scene as well, but not be limited like the current particles are.
I had asked a couple of tutors at my school about it, and they suggested I see about asking a teacher and posting to a forum with this question, as the only thing they could think of was using the camera position and doing a raycast from all the objects in view. Mind you they do not know much about writing shaders.
Thanks for the link, I’ll take a look at it.