Hey Justin!
Denim would fall somewhere between cotton and felt. I tried to select fabrics that were on the extreme ends of the scale, one way or another.
But what you learn in these videos can easily be applied to sculpting denim as well, just like any other conceivable fabric out there.
If you want to sculpt denim jeans on a figurine, I suggest to either wear a pair of jeans and take a photo of yourself in the desired pose, or search for suitable reference images online to help you sculpt the fabric so that it looks exactly the way you want it to.
