**Surface A** | A | Surface along guide curve to tween from | Surface |

**Surface B** | B | Surface along guide curve to tween to | Surface |

**Guide 1** | G¹ | Guide curve to tween along (best if flowing from Surface A to Surface B) | Curve |

**Guide 2** | G² | Optional second guide curve to tween along (best if flowing in the direction of Guide 1) | Curve |

**Factor** | F | Tween factor (0.0 = Surface A, 1.0 = Surface B) | Number |

**Refit** | R | Optional Refit match method.
(No Integer or 0 = Off, Integer greater than 0 = On and surface degree of refit)
If an integer greater than zero, Refit match method is used if possible. When input surfaces are refit their control points are redistributed, added to, and removed from based on the surfaces 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 surfaces are sampled their control points are recreated by equally dividing the surface by the input integer point count. Point Sample results in looser shaped tweens, with uniform control point distribution. | Integer |