Now ZContainer is back for Flash Player 10!
Since using the build-in z property forces ANYTHING to be cached as bitmap,
therefore toasting the CPU,
creating a mere 2.5D effect with billboards using the z property is not a good idea.
I've rewritten the ZContainer class from scratch just to circumvent this problem.
The new ZContainer is a 2.5D engine,
which can be in either perspective-projection or orthographic-projection mode.