**Curves** | C | Set of curves to tween between | Curve |

**Factor** | F | Tween factor (0.0 = Curve at C, 1.0 = Curve at C +1) | Number |

**Loopback** | L | If True, allow the tween path to continue from the end back to the start as a closed loop | Boolean |

**Interpolation Type** | I | Determines how the tween path is interpolated
0 = Straight
1 = Normal
2 = Tight
3 = Uniform | Integer |

**Refit** | R | Optional Refit match method.
(No Integer or 0 = Off, Integer greater than 0 = On and curve degree of refit)
If an integer greater than zero, Refit match method is used if possible. When input curves are refit their control points are redistributed, added to, and removed from based on the curves curvature and the input integer degree, while trying to maintain their shapes. Refit results in tighter shaped tweens, with curvature based control point distribution. | Integer |

**Point Sample** | P | Optional Point Sample match method.
(No Integer or 0 = Off, Integer greater than 0 = On and amount of sample points)
If an integer greater than zero, Point Sample match method is used. When input curves are sampled their control points are recreated by equally dividing the curve by the input integer point count. Point Sample results in looser shaped tweens, with uniform control point distribution. | Integer |