1. mono 360
Start here. Adding new 2.5D graphics to 360 mono video is fairly straightforward.
2. stereo 360
Adding stereo to the above example requires an extra step, the creation of an over-under composite.
3. cineware 360
The Cineware plugin supports stereo 360 rendering, so you can add 2.5D graphics to a scene you created in Cinema 4D, as long as the camera is stationary.
Nick Fox-Gieg 180429