are going to learn something about perspectives. It all depends on how
far away you are from the object as to how you see it: this is the idea
of perspective. Lets take a glass as an example. We are going to use
the top of the glass as an indicator.
eye is on top of the glass, we will see what is inside the glass and we
will see the side of the glass. The base will be curved.
you can see how I am drawing the glass: if there was any liquid in the
glass you would be able to see it.