I stumbled into something interesting while studying Houdini 11. This is actually shaded voxel cloud in 3d space.
The stars are just a background but perhaps I'l change them to particles later and try an animation..will see. Too many projects going on atm but this thing is just too interesting not to research further
Edit: Did a little animation of similar scene. Shitty quality but I guess its okay for the first attempt [link]