This script can be used to quickly turn layered artwork into a 3D multiplane scene.

This expression maintains the objects apparent size as it moves away from camera.
It's helpful for taking a flat layout and making a "multiplane" layout from it for animation.

A Macro that allows you to set objects at Z distances and creates a camera that pans, dollys, cranes etc keeping parallax. Also calculates the relative focus for each layer including using hyperfocal which can be turned on or off.