Modify darts on your patterns - Fiskars Unzipped
Added Feb 21, 2011
Here I just added another tuck on top of the first one, directly stitching it. It is possible with a stretchy fabric.
Please note that this is not how the dress "Marlene in the 50s":http://www.burdastyle.com/projects/marlene-in-the-50s-bernina-3-series is made.