3-Headed Monster Creation in GeoGebra AR
Here, we have a 3-headed monster created within GeoGebra Augmented Reality.  
The blue surface equation is 
.  The floor function = same as the greatest integer function.  
Domain restrictions on this blue surface are as follows:  
The pink surface has equation identical to the blue surface.  Yet to fill in the eyes, we used domain restriction .  
What other kinds of surfaces can we create by authoring surface equations with domain restrictions?