We at Capture Brasil Study Group are looking for solutions to create a mirror ball based on a "mirrored" ball, emission of light inside the ball and devices that illuminate the ball externally to give a certain realism to the scene.
The first solution is by Luiz Paulo Nenen (the one with a wall and the live view in Beta).
We can also use more than one ball, each one with different characteristics depending on the material applied and the outside light having a crucial role in the effect, this is Marco Vitale's solution (live at Alpha).
Oz
https://www.dropbox.com/s...SR9GEmGVhyL_rea?dl=0