You can remove existing faces by using Remove Dialog (Figure 5), which opens by pressing Remove button from Construct group. All you need is to select the face or face set to remove with Face Chooser (presented in Figure 5 in brown border; see below how to use it) and press Remove selected button. Please note, that removing faces process is resources consuming. It is better to remove once a large amount of faces then to remove them one by one. It isn’t possible to remove points as they are not part of geometry. If you want to remove all faces and all points, just construct new space by pressing New button from Space group and accept default values.
Choosing Face Set. You can choose a set of existing faces using Face Chooser. The Pattern input accepts name patterns. A name pattern is a set of point names. Their order doesn’t matter. You can write them toghether or separated by a space or any other character(s), different from capital letter and digit.
The + Pattern button adds to the current selection (listed in upper part of Face Chooser) all existing in space faces that match the pattern by selected match criteria. The - Pattern button removes from the current selection all faces that match the pattern by selected (may be different) match criteria.
There are 4 different match criterias.
In order to select all existing faces choose Pattern subset match criteria and leave Pattern blank, after that press + Pattern button. If you want to clear selected faces list, choose Pattern subset match criteria and leave Pattern blank, after that press - Pattern button.