> I've had several ideas to model the worm: blobs, CSG,
> isosurface (using blobs as basis) or mesh.
> 
> -Blobs do have some modelling issues (intersecting
> spheres will blob...) so I've ruled them out.
> -Isosurface: same as above with blob-approach,
> aside of that: slow to trace.
> -Mesh: Slow to parse in animations with sufficient
> detail (I'm talking pure POV!)
> So, CSG made it.

How about sphere_sweep?

   Mark


-- 
merge{#local i=-11;#while(i<11)#local
i=i+.1;sphere{<i*(i*i*(.05-i*i*(4e-7*i*i+3e-4))-3)10*sin(i)30>.5}#end
pigment{rgbt 1}interior{media{emission x}}hollow}//  Mark Weyer

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