>>But yes a side effect of this method is you have to place
>>more profiles to control the shape along the central line.

...and what about third method for sweeping as described here?

[quote:integrityware]
These three images show three different Shape Scaling techniques we use. First is streatching where we basically streach or shrink along the vector between the rails. Second is uniform scaling where the entire curve is scaled uniformly. Third utilizes a third rail to define the scaling height in direction purpendicular to the line between the two rails.





[quote]

Petr