Giuseppe:
It is first an issue of adding to the 2D Script a fill command for the area you want to cover,
Poly2 being the simplest (and least parametric) up to
POLY2_B{5} which gives the most options, but may be overkill for this task. The fill could be hard coded (no user controls) or more parametric for fill type, fill pens, fill orientation, etc. So it is not an issue of changing some parameters but adding a
Poly command then adding the parameters for the fill attributes that require user control. You can look at one of the ArchiCAD library parts, like
Precast Column 15 so get some ideas.
David
