Delete a few polygons from a mesh inside UE 4.26?

Development Asset Creation
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1

How, is it possible to delete a specified section of polygons from a model in UE4.26?
For example, cut out a door frame on the doors part of the building?

2

I can’t recall what stage the modeling tools were at with 4.26. If they were doing ok, then yes, using the modelling tools ( SHIFT5 ).

If not, then it might be easier to do in Blender.