You would still need to shape the back of the kilt in to the small of the back - not make a tube.

A kilt is two different halves, the front, consider it a bay window you need to curtain, and you'll probably need to put in deep pleats at the side so that when seated there is enough material to cover the thighs. The fell at the back is a fan of pleats shaped to follow the shape of the body between where the pleats fall free from the body and the waist.

If you are short of material, could you use a piece of dark toning fabric to make the under apron? If it gives you enough fabric so that the apron will cover the under apron in almost all situations then it might be something to consider.

Anne the Pleater :ootd: