Hi everyone,

I just came across this thread and the very nice solutions presented here.

I had a similar issue with an elongated torus. However, I had the feeling that
the functions presented here require some calculation of the ray tracer. There
is a rather simple (quick and dirty) workaround, which might save some
computational effort:

When shapes overlap sufficiently, the ray tracer is rather quick. So I got my
elongated torus with a small trick using a for loop:

    #for (n, 1,99, 1)
        torus { 1,0.1
            translate<0,0.1*n,0>
          } // end of torus  -------------------------------
    #end

This makes you an elongated torus along the y-axis, from 0 to 10, with a major
radius of 1, and a radius of 0.1 for round corners.

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