I have seen somethings on here that have this feature, but dismally when I go to find them to show you, I cannot locate them
Never fear! I know of the technique and its really quite simple. If I remember correctly its all about taking the current skirt and tacking it to make the different layers. Oh never mind I'll just paint on it and show you what I mean.
Now, imagine the skirt is floor length... Now grab a small section and pull it up, and tuck it under the above fabric.. then stitch it there. (pink is tucked sections, blue is stitching)
Then go along and do that every so often varying your amounts you tuck and stitch as you go.
ok that made sense in my head. I hope it made sense to you.