Figure. Created boundary surface of the FREE and FIXED regions.
In ProTOp the export surface is defined as the boundary surface of a combination of material regions. Note that the material regions are combined first to form a single volume region; after that the boundary surface of this single volume region is created. This means that the created surface should always be a closed surface.
The figures below show two examples of exported surfaces in dependence of selected material regions.
Figure. Created boundary surface of the FREE and FIXED regions.
Figure. Created boundary surface of the FREE region only.