Not a PB, it’s using 6 hub75 64x64 panels, a Raspberry PI and a board that does 3 different channels to control em, plus battery to run 15-30min, and a fan.
I know @embedded-creations has a board that converts pixel data into hub75, but I doubt driving 24k pixels would be simple. Doing one panel at 64x64 (4096 pixels) might be doable, so you’d need to have each panel be independent.
I’ve seen these cubes with FPGAs doing the heavy lifting. Bob Miller and Pioter Esden had these at SuperCon and Teardown, powered by Esden’s ICEBreaker. Fun stuff!