I've found that the wineglass.pov file might at first appear to render okay 
in the regular executable but I noticed it doesn't have the parts of the 
glass the way they should be. Apparently the QCone_Y, being a quadric, isn't 
able to be used right in the CSG intersection. In fact, while I made changes 
to the top of the glass it somehow affected the bottom, completely different 
declares. Very odd thing.

To see the glass parts you might want to change the glass texture to be 
opaque. I replaced that with pigment { rgb 1 }.

Bob

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