In this tutorial we’ll use a technique called Depth Compositing to combine stock footage with 3D rendering and the use a Z-Depth pass. This method allows you to place 2D elements like stock footage into the depth of a 3D render. I also demonstrate how to export a Z-pass from 3D max, Cinema 4D and even use Element 3D to output a depth channel.
The stock footage are from Action Essentials 2!
Here is the example of using Depth Compositing from a while ago, I know the sound FX are bad, but hey, I mixed them in After Effects!