A sheet made of sticks

There is no fabric in here. There are 572 points and 1,621 invisible sticks between them, each one insisting on staying the same length. Fix every stick a few times per frame and the whole thing starts hanging, folding and swinging like cloth. Drag on it to push it around; shift-drag to move the camera instead.

"Stiffness" is literally how many times per frame each stick gets corrected. One pass and the sheet behaves like rubber; turn it up and it stops stretching and starts behaving like canvas. Nothing else about the material changes.