Magic Mask output as Planar Tracker occlusion node input?

Hi!

TL;DR - Can the Planar Tracker only take in a polygon as an Occlusion Mask?

I'm trying to pull a planar track from a stage background with plenty of trackable detail. Trouble is, bloody actors keep walking about in front of it, so I am trying to use a Magic Mask node to quickly pull a rough - actually annoyingly accurate - garbage mask that I can plug in to the Planar Tracker occlusion mask input, but it isn't working.

The matte output of the MM is perfect. Nice white person-shaped thing that is dilated to give a little safe zone, but the Planar Tracker is ignoring it.

Plug a polygon node into it and it's very happy, but I've got three actors repeatedly crisscrossing each other wildly waving their arms around, spotlights are moving here and there, and hand animating all of them well enough that I wouldn't be obscuring the entire background would be prohibitively time consuming.

Having RTFM'd it states that one use of the Magic Mask is to provide quick garbage mattes for subsequent operations, and it's annoying that it doesn't appear to work.

Thanks!

Feed the Magic Mask through a BitMap node and then into the occlusion input.

Yep

The MM mask doesn't provide a classic regular mask out of its own node, the bitmap does and moreover it's its main purpose