These are my intial attempts to create shadows which are different from the actor. I used 1 light source from behind the camera with 1 actor in front of the camera and 1 actor behind the camera.
These two photos show how the effect could be achieved in-camera. However, the first image has the subject unrealistically lit and the second uses an additional light source which casts another shadow on the wall.
I will continue experimenting with these techniques to see if it is possible to find solutions to these problems.