Path Order

Controls the interpolation method used to generate the fitting path between the basic path points. 

Cubic Spline fits a continuous curve through points.

This is generally best for curved geometry such as dummies, it also gives a clear indication of the "outwards" direction used when projecting the path forwards.

Linear fits straight lines between basic path points.

This is more likely to work well for arbitrary geometries made up of a series of straight sections, perhaps fitting a belt between rollers.

Mixed is the average of Spline and Linear shapes.

This may work well in mildly curved situations