This is the second part of the video with a simple 3D scene (https://youtu.be/HtZ2U2VYcUA).
In this video, I tried another workflow in order to cast some shadows from the actor to the virtual world. I also tried to add some reflections.
In some cases the shadows do not perfectly match the feet, but it is simply to show the general workflow I used :)
-------------------
In the following video you can see all the details for the creation of a chroma key set for vitual productions:
► https://youtu.be/woNgBjZ7avI
For more details about camera tracking and virtual production:
https://youtu.be/YjJFppadSlE
https://youtu.be/zccmFlsGqVQ