This is obviously due to my complete misunderstanding of the way the preview lights work as opposed to the rendered final.  I'm a filmmaker that uses Poser to make set extensions (matte shots) and CG sets for some of the sci-fi shorts I make.  I obviously want the final result to look as realistic as possible within the limits of Poser.

My confusion comes from the fact that the preview light (a simple spotlight I shined through the screen to get the pattern on the wall) can see through the screen and pick up the pattern.  This same light can shine through the wall or ceiling in preview but doesn't show up in the render - as a found after rendering about twenty times with no light showing up on the wall as it did in preview and then discovering that said light was above the ceiling of the room.

I'm obviously going to have to sit down and do a lot more experimentation to get the near realism I'm looking for.  Using BB Glossy really helped with adding a great look to a Dreamland sci-fi set I'm woking on.

The problem of the glass transparency is very challenging to me, Miss Nancy.  I'm looking for transparency and reflections off the surface of the glass and haven't had much luck so far.  Of course it would help if I knew what i was doing.