This will make closed surfaces behave more like a soft body.
As always, I'm a bit uncertain with the naming of options. So I'm open to alternative naming if there is something more proper.
On of the things that is left to do is to decide what to do when dynamic base mesh is on. Having a dynamic base mesh will force recalculation of springs and will currently not work with this. I'm guessing I could simply disable internal springs if dynamic base mesh is on?
@campbellbarton @mano-wii sometimes (with suzanne for example) this triggers and asset in `blender/blenlib/intern/BLI_kdopbvh.c:1292`
`BLI_assert(!((flag & BVH_OVERLAP_RETURN_PAIRS) && (flag & ~BVH_OVERLAP_BREAK_ON_FIRST)));`
I do not set these flags with my code, so I'm guessing this is an issue with defaults?