Emailed official support for this, but hoping to get an answer quickly....
When I move a project to a new computer for playback, the Materials often stop displaying in the output (I’m just using a couple of the default ones, not user-installed materials).
They’re previewing in the media window, they work fine in Input, but they show up as black/empty elements in Output. On the machine they were created on, everything works as expected.
Screenshot here (it wouldn't let me attach because the board quota has been exceeded): https://brandonbell.com/xtemp/madmapper.jpg