**Rail 1** | R¹ | Rail curve that the first and fourth corners of the twisted boxes are on | Curve |

**Rail 2** | R² | Rail curve that the second and third corners of the twisted boxes are on | Curve |

**Rail 3** | R³ | Rail curve that the sixth and seventh corners of the twisted boxes are on | Curve |

**Rail 3** | R⁴ | Rail curve that the fifth and eighth corners of the twisted boxes are on | Curve |

**Parameters T1** | t¹ | Division parameters along rail curve one's {t} domain (0.0 = Rail 1 start, 1.0 = Rail 1 end) | Number |

**Parameters T2** | t² | Division parameters along rail curve two's {t} domain (0.0 = Rail 2 start, 1.0 = Rail 2 end) | Number |

**Parameters T3** | t³ | Division parameters along rail curve three's {t} domain (0.0 = Rail 3 start, 1.0 = Rail 3 end) | Number |

**Parameters T4** | t⁴ | Division parameters along rail curve four's {t} domain (0.0 = Rail 4 start, 1.0 = Rail 4 end) | Number |

**Weighted** | W | If True, parameters {t} distributions are weighted by the input rail curves curvatures | Boolean |