After looking around, I chose McCall's 5681, a costume pattern for a 50's poodle skirt. This one was constructed with tulle or net half-circles attached to a fabric yoke. The pattern calls for one layer of net despite suggesting felt, corduroy, and denim for the real skirt. One layer was not sufficient for my cotton dress so it definitely wouldn't have made a difference to a skirt made of thicker fabric. I ended up using one layer each of tulle and net, but think I will probably add additional layers later. The edges of the tulle should be finished with ribbon or lace but do you know how hard it is to find blue trim? So, I'll add it when I find it.
Pre-petticoat of any kind
With red mega-petticoat: what you can't see is how crinoline, bell-shaped, stiff it looks and how crunchy it sounds. You can make out the tulle rows from under the thin cotton fabric easily.
With blue petticoat-lite: much better, though I may add one or two more layers of the thicker tulle. Do you see how scandalously sheer that tulle skirt is? Wow!
An artistic shot