I wish to make a "tube" which follows along a set of cartesian coordinates
which I input:

{x1,y1,z1},
{x2,y2,z1},
....
{xN,yN,zN}

and the tube radius.

In general, the "tube" does not obey a quadratic polynomial, but it could
easily be represented by a cubic-spline.  I though about making a bunch of
cylinders, but this might introduce texture that shows the granularity of
my step size.

Does anyone have a solution?

Thanks!
Eric

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