And yet again, is Poser using free open source tools and make you pay for it.
Who would have ever believed, Bondware invested in creating anything usefull on their own?
Poser announcement:
https://www.posersoftware.com/article/1094/announcing-poser-cloth-dynamics
about Bullet Physics:
https://www.google.com/search?client=firefox-b-d&q=Bullet+physics+free

Hurry up to read it, before admins will delete this or lock it.