| 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 |
| Thickness | T | Thickness of the twisted box strip, offset from the rail curves | Number |
| Parameters T | t | Division parameters along each rail curves {t} domain (0.0 = Curve start, 1.0 = Curve end)
For best results parameters should be between 0 and 1, in numerical order, and non duplicate | Number |
| Weighted | W | If True, parameters {t} distribution is weighted by the input rail curves curvatures | Boolean |