Black background when playblasting in Maya Standalone mode


I’ve been trying to get Maya to playblast using mayapy.exe in standalone mode but I’m getting a black background instead of the gradient gray background I was expecting.

I’m assuming this has something to do with the fact that standalone doesn’t really have a ‘viewport’ per se.

Is there a way to force the background to be visible or has anyone found a way to make standalone playblasts look like playblasts you would get from UI mode?