I turned this dress
I took the small "bodice" off the skirt. I was just intending to "hem" the ruffle left by the fabric above the elastic shirring, but instead I added elastic after taking out some of the elastic shirring that had come un-sewn. Of course I made the elastic too tight, so it hurt my back/insides/waist, and after months of procrastinating I fixed that, easily of course for all that stalling.
I have more recently produced the below skirt which is also a dress-to-skirt alteration although a bit more complicated and less satisfying since I have to cover this waist treatment with a belt.
I cut the top off the dress (it was basically a sack), stitched the lining to the skirt (I left an opening on the top for the elastic, but now I realize I should have done it the way instructed for the below skirt), and sewed below that seam to make a casing.
Then I altered a skirt that I had made. I took about 20" out of it, and it is much more flattering now. I do not know if I ever posted about this skirt or not, but here is the tutorial. Imagine the possibilities! Airy silk, long maxi, pouf-y velvet.