you could do a thick strapped sweetheart neckline fitted bodice and a round or circle skirt around the bottom. A small crinoline will make it look better, but will also add heat I would assume a sturdy cotton would work well.hope I could help.
For the skirt you can use a pattern like this one: http://mccallpattern.mccall.com/m6030-products-10728.php?page_id=109 but I would cut panels three times the size of what they ask for and gather it onto the bodice to get the fullness. The best kind of fabric would be lightweight organza or silky light weight fabrics. Do you plan on dyeing the dress afterwards? If so polyester satin is very difficult to dye and you are better off using an already dyed ombre satin. If you want to dye it yourself you should use silk since it takes dye a lot better than polyester.
I was told silk soaks up color to quickly to be considered a decent fabric option. I wanted to dye it red to black
Ok so I wanted to make a prom dress and finished it, but after looking at it I realized that It wasnt what I really wanted for my senior prom dress. I donated my the first dress I made and Then I saw it!! The most amazing dress ever. I wanted to do an ombre effect from red to black on this dress but Its an expensive wedding dress that wont even be out before my prom >.> I was curious What the basic pattern pieces for it was, or basic costruction for this dress. I want to build a corset underneath and put lace on it to represent the top and put satin type pieces above it. But Im confused about the skirt. Tips on drafting the dress? What fabric would be best? I thouht a poly-satin to work with dye-in the fabric afterwards. Any help is appreciated ^.^