On page 449 of the reference guide, we learn that the automatically-cut opening has radial sides, while if WALLHOLE is used the sides are parallel. Is there any way to get radial sides, in the case where WALLHOLE is needed because of a non-rectangular opening? I’m only concerned with 3D.
You should try the wall niche instead – that can create pyramidal or wedge shaped cutting bodies – same as the cutform command.
In some situations, you’ll need more than one cutting bodies to have the proper cut on each sides – especially with reveals. Many of the standard shapes are handled by the WallholeCut macro in ARCHICAD library, you can check that too.
Team Leader, Library Team GRAPHISOFT SE