Hi Rick, 

we're learning VUE together. 

FYI, I added a sphere, cylinder, and pyramid to a scene just to see
if VUE put things in a default spot......they all were placed
on top of each other at the above coordinates. 

When I create an empty scene, VUE puts primitives @ 0,0,3.

Maybe it depends on what is already in the scene. 

The first scene with the strange default coordinates  already had a 
terrain & clouds. So maybe VUE offset the primitives so they wouldn't
be obscurred (?).

There may be a reference about it in the User Manual, but I couldn't find one. 

Lots to learn!