ArchiForma 2 - Surfaces from 3D polylines

Draw a Section/Elevation Line on the story and open the related Section/Elevation Window.
Select the 3D Polyline Tool and draw the first profile line.

Once the cruve is finished, double click on it and ArchiFOrma 2 lead you back to floor plan window to place the polyline.
Open the Section/Elevation window once again to draw the second 3D polyline that will follow the first 3D polyline path.

Place the second polyline on the floor plan, select both polylines and use the Tanslation Surface of the ArchiForma 2 palette.
In just a few seconds ArchiForma 2 generate the surface.