The option controls how new structural elements in the construction stages are applied to the already existing deformed structure.
Initial Position
The new elements are applied with the orientation to the initial position; that is, to the provided geometry. The deformations are compensated throughout the construction process. In theory, there is buckling in the geometry (Image 02 1.)
Tangential
The new elements are applied with the orientation of the already existing deformed elements; that is, tangential to them. The deformations are not compensated throughout the construction process. In theory, there is no buckling in the geometry (Image 02 2.).