I'm trying to build in some plasticity and would like a bit more information on how these attributes are used in the finite elements solver.

Modifying the initial rest position is easy enough at sops level, but since cloth doesn't really have a object-positional awareness, has anyone used these attributes to deform in a plastic sorta way? The problem is that mixing in P with restP is sensitive to position (like falling) not just impact changes etc. But, modifying the restP by getting the length of restP-restPprevious seems to have that effect if rest is changing every frame.

So, has anyone successfully build a plasticity deformer for the finite elements or used these attributes in this or a similar way?