Create a multipipe with varying radii from a set of curves.

Input parameters:

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

Output parameters:

1. Mp → The multipipe subdivision surface.