> I don't think POV-Ray can make a solid object with an interior form polygons.
>
>

You can make a "solid" object from any patch, triangles, or polygons. 
You just can't use them in a difference if it's not the first element.
In an intersection, it don't behave as expected.

In an intersection, you only get the surface. It will look somewhat like 
a clipped_by. If you make a difference of 2 such objects, you get nothing.
In a difference, it removes nothing, but a solid object will cut it and 
you'll see the second object's surface.

It CAN have an interior. That interior CAN have colour fading. It can 
also contain some media. It CAN'T have an inside_vector.


Alain

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