Yup, pixie #2 in my Cornish Pixies of Whitinsville series had an even shorter skirt where you could see her underwear. The underwear was skimpy and not (ahem) ‘full coverage’. Not quite appropriate for my young-teen audience.
I printed the image on watercolor paper and painted on a skirt. Then scanned it back into my computer. I then added some photoshop touches.