I was trying to make a mesh2 that looks like this: imagine a goldfish bowl with
a conical funnel glued to it.  The "circle" of the goldfish bowl is congruent
with the large "circle" of the funnel, with the funnel poking back up inside it
rather than being a "hat".

I used a macro of my creation to extrude a mesh2 into this shape. A problem-- a
feature-- of my mesh2 is that the normals all point away from the center line
of the object. They are "correct" for the bowl portion but pointing the wrong
way for
the funnel portion.

Odd thing is that when I render it, it looks like the opening of the goldfish
bowl is closed off as if I had put a flat cylinder there.

Now I know that it something might be unseeemly in a structure where the normals
are messed up. But I wouldn't have expected my messing with the laws of nature
to close off the shape.  Have I interpreted what I'm seeing correctly?

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