Tendr: a real-time, volumetric, soft-body physics plug-in for UE4

Community Showcase Game Development
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Hi, very intresting!!
A few days i try to find any usful information about soft body physics implementation in UE4, but found only article in UE3 documentation:
http://udn.epicgames.com/Three/PhysX...Reference.html
What approach do you use?