When the camera moves in this scene, the persons face does seem three dimensional. For all the extra effort however the effect is so subtle it will likely go unnoticed. I am wondering if applying the 3D rig to the skull would have worked. I will try that in a future scene. The hazmat suit was done using smart objects to get some dimension in the shot. The skull and hand are closest to the camera and therefor lightest then the closest areas of the suit were blocked in.
The shot is less than a second (26 frames) so I will not go back to refine it any more. I finished 8 shots yesterday, so my pace has picked up. At that pace, I should finish the film in 28 days.