I am not sure how the WT does it or what technology is used. But when I look at the jw.org website and look at pictures in the recent publications from the Lord's Evening Meal / Last Supper, it seems very strange.
I turn on my TV, put on 3-D glasses and the apostles now appear to be current and former members of the Governing Body.
I turn the TV off, restart it, and it appears to be the same members but now they have changed seats.
Rub a Dub