Create a multipipe with a constant radius from a set of curves.

Input parameters:

1. Cs → The curve network to pipe. Curve discontinuities and end-points become nodes.
2. Rd → Radius of multipipe surface across all the nodes.
3. Bg → Radius multiplier along the pipes connecting the nodes. Factors below 1.0 pinch, values above 1.0 bulge.
4. Tr → Size of the transition from a node into its pipes, as a factor of the radius. Zero omits the transition section entirely, leading to a smoother result.
5. Sp → Optional approximate spacing of loops along each connecting pipe. If not specified, no additional edge loops are added.
6. Ka → Maximum angle between consecutive segments along curves and across nodes.
7. Cu → Tendency to fit a cube at near-orthogonal nodes, from 0 = never to 1 = most often.
8. Cp → Pipe capping option.
   • 0 → None
   • 1 → Round
   • 2 → Flat

Output parameters:

1. Mp → The multipipe subdivision surface.