Groups are key to working with Itasca software, as they allow you to name model objects for easy reference later, for example, when you want to assign properties to one part of the model (but not another), apply forces to the walls of a tunnel or a foundation, or assign boundary conditions. In this tutorial, we review how to automatically skin models, identify and group zone faces, and interactively select and group zones and zone faces. This tutorial also illustrates using the Model Pane to interactively add a shell structural element along a tunnel.
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