Visibility Entity Attribute
Visibility of an entity is programmatically controlled via IEntity_DG.Visible property.
Visibility is a persistent attribute. It can be overriden in a view via IScene_DG.Show().
So, an entity can be visible in one view and hiddent in another. Visibility modifications done via IScene_DG.Show() are ignored by persistance. Duplicate the change via IEntity_DG.Visible to save the change.
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