Yeah, I never use either of those and that's what it was looking for. Le sigh. I can add them then delete the construct and leave the Ground, and then it works. It is a bit clunky that it needs another thing to work, it is not mentioned in the manual that it absolutely needs it, but I can deal. I may suggest to Ken over at the proper place to include a little note for people like me who start from an absolute blank scene and use either BB's or Snarly's ESphere.

Thank you very much for your help!!