| `sketches` | [`[Sketch]`](/docs/kcl-std/types/std-types-Sketch) | Which sketches to loft. Must include at least 2 sketches. | Yes |
| `vDegree` | [`number`](/docs/kcl-std/types/std-types-number) | Degree of the interpolation. Must be greater than zero. For example, use 2 for quadratic, or 3 for cubic interpolation in the V direction. This defaults to 2, if not specified. | Yes |
| `bezApproximateRational` | [`bool`](/docs/kcl-std/types/std-types-bool) | Attempt to approximate rational curves (such as arcs) using a bezier. This will remove banding around interpolations between arcs and non-arcs. It may produce errors in other scenarios Over time, this field won't be necessary. | Yes |
| `baseCurveIndex` | [`number`](/docs/kcl-std/types/std-types-number) | This can be set to override the automatically determined topological base curve, which is usually the first section encountered. | No |
| `tolerance` | [`number`](/docs/kcl-std/types/std-types-number) | Tolerance for the loft operation. | No |
| `tagStart` | [`TagDeclarator`](/docs/kcl-lang/types#TagDeclarator) | A named tag for the face at the start of the loft, i.e. the original sketch | No |
| `tagEnd` | [`TagDeclarator`](/docs/kcl-lang/types#TagDeclarator) | A named tag for the face at the end of the loft, i.e. the last sketch | No |
