Reference Topics > Example: Create a guided loft with interpolated spine
  
Example: Create a guided loft with interpolated spine
If a vertex of each profile touches a vertex of the spine, the spine is interpolated by the generated surface. This behavior is similar to what happens when interpolating birails. You can interpolate a spine using non-planar, non-orthogonal profiles.
Imprinted edge is the spine (orange). The curve is the profile (blue).
The spine interpolates the profile. The profile is not scaled.