This was discussed over at lightnetwork.com in the general thread "This is nice programming" (sorry, can't link to the thread).
Informed source Anthony Headley had this to say:
"Hey all, just wanted to
drop in and answer a few questions:
The Imagine Dragons Gold video was produced in part using 210 Magic Panels controlled by a GMA2 and
PRG Mbox Extreme
Media Server running Designer 3.9. Data from both controllers was merged using the
PRG Series 400
Power & Distribution
system running the new version 5 software.
The whole project was drawn, programmed and, shot in three days with Guy Pavelo Designing / Programming and Moment Factory doing the creative.
The imaging on the Magic Panels was a combination of Mbox content, the GMA2 FX engine and simple but effective movements to crate some stunning beam effects.
The newly updated
Pixel Mapping UI in Mbox 3.9 allowed quick and easy manipulation of the 7560
pixel map, and the updated Series 400 v5 software allowed a seamless two way
Art-Net merge of the 78 universes from the GMA and Mbox.
Regarding the Magic Panels on camera left with the funny colored pixels; this issue was actually caused by a non field repairable software issue in the Magic Panels and with no replacements available in short order on the west cost the crew did their best to overcome the issue.
I think Guy and crew did an amazing job in such a short time.
--
Anthony Headley
Mbox Extreme Product Supervisor
Production Resource Group"