Here's another illustration how how domain restrictions can powerfully affect graphing surfaces within GeoGebra Augmented Reality. [br][br][b]Questions to consider:[/b][br][br]What kind of quadric surface is the[color=#1e84cc] [b]blue surface[/b][/color]? [br]How can we tell?[br][br]Since the [b][color=#ff00ff]pink plane[/color][/b] has only 2 domain restrictions listed, why are there 4 holes? [br]