Gore

A gore is a piece of material which is designed to add gradual body to a garment. They are usually triangular shaped panels sewn together to allow the piece to expand.

http://www.google.ie/imgres?um=1&hl=en&biw=1024&bih=431&tbm=isch&tbnid=dCWiFsM4Megl4M:&imgrefurl=http://wkdesigner.wordpress.com/2007/09/29/gored-skirt/&docid=A6xFa1C8m8mMsM&imgurl=http://wkdesigner.files.wordpress.com/2007/09/gore-skirt.jpg%253Fw%253D510&w=320&h=480&ei=8TOKT690zYqFB_WHvb0J&zoom=1&iact=hc&vpx=82&vpy=45&dur=3088&hovh=275&hovw=183&tx=100&ty=224&sig=108302672573427264922&page=1&tbnh=110&tbnw=67&start=0&ndsp=17&ved=1t:429,r:0,s:0,i:62

I took this example from the website above and unfortunately cannot find the designer. It is, however, a perfect example of a gore being used to expand a skirt and create shape.

With this idea in mind, other adaptations could be experimented with to create all kinds of silhouettes.