So here’s a little tutorial on how to create skin folds:
(Unfortunately I have to split it up in multiple posts, since new users can only upload one image per post):
As already said, I used the smoothing deformer. The basic setup is pretty simple: make it a child of your mesh, switch the mode to „relax“, then initialize it. Now if you deform the mesh, it creates quite naturally looking folds, if the mesh has enough polygons.
And this is the crux:
We want to use the smoothing deformer on a high resolution mesh, but don’t lose the procedurality by converting the SDS to real editable polygons. (If I would do so, I wouldn’t be able to use my joint-based rig anymore).
The first thing I tried, naturally, was this: Just place the SDS together with the smoothing deformer under a null. Then hit initialize, then deform: nothing happens. It seems for some reason the SDS (or probably generators in general) are not recognized in the initialization process (even though it seems something gets stored in the smoothing deformer, indicated by the memory usage).
So this won’t work.