rendering – How to display a plane to an already rendered ifc model?

I’m using xbim’s windows UI, and have managed to render ifc models and add a cutting plane like


I want to render the cutting plane to be visible on the screen. I figured solving this by manipulating the IFC model would be kind of stupid. Is there a way to render the cutting plane?
Maybe using the helix toolkit powerting the WPF control Xbim uses to render stuff?

The goal is something like this


edit: For me it seems that the xbim DrawingControl3D only accepts IFCStore types to render. Do I need to use the original Helix control to be able to draw anything other than an IFCStore model?

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