There's something I'm struggling to pull off in Sculpt Mode, I'm trying to create a type of, heavy fold, if you will. It's less like the folds or creases in clothing, and more of the type of fold you'd get if you, well, I don't know how to explain it, but this picture on Dictonary.com kind of is similar to what I'm trying to hit.
Those sharp, deep, weighed over folds in E, with the top of the mesh folding over the bottom part of it, still keeping an opening, but being, more like what's in the picture.
I've given three types of sculpting a shot, the left is thumb, with a smooth afterwards, the middle is grab with smooth, and the right is Snake Hook with smooth. None of them are, what I'm going for. The inward fold is non-existent, it's more like the top of the is melting over the bottom instead of creating a fold like the picture.