I have also put my teeth into Bill Pragnell's Mesh Approximator macros, 
revisiting the ruined place I had been working on earlier.

Here, I have *eroded* the column segments using the MeshShape() macro. It 
took some experimenting until the shape came out right, but I am rather 
satisfied with this. The basic shape is CSG. I experimented with isosurface 
but could not get the top and bottom surfaces right. They resulted in 
strange funnel-shaped surfaces.

Another difficulty is the base of the column which consists of a flat CSG of 
torus and cylinder. I have not (yet) been able to approximate that correctly 
with the macro.

Anyway, here is the state of the art.

Thomas

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