Does GNL support pleats, tucks, and darts? These sewn features help make flat cloth conform to curves in the body. The terms don't seem to be mentioned explicitly in the repo, though maybe they can be implemented with the existing notation.

https://en.wikipedia.org/wiki/Pleat | https://en.wikipedia.org/wiki/Tuck_(sewing) | https://en.wikipedia.org/wiki/Dart_(sewing)