"bake color there from all volumes" - transferring vertex paint from multiple voxel volumes to one merged visible volume. A merged visible volume being a composite voxel volume of all visible volumes in the layer stack. First a new empty layer is created and then all visible volumes are merged in to this. Voxel layer stack > Right click empty target layer > select "merge visible"
To bake the vertex paint information from each voxel volume layer to the "merged visible" composite , right click the merged visible layer and select >"bake color there from all volumes" .
No prizes for painting will be awarded in this video :-)
But hopefully it was of assistance to friends of the coat.
Full credit to cl-apps for making me aware of this feature. Meteor - property of Mr Eric Cosky , astral miner.