Exactly, but the simplest version is that your just convert it to tetrahedral meshes and SDK makes the rest for you.

Here is one very good old example demo of Soft bodies, if you are interested yet:
THE GREAT KULU: TECHNOLOGIE-DEMO


Regards, Robert

Quote
Everything should be made as simple as possible, but not one bit simpler.
by Albert Einstein

PhysX Preview of Cloth, Fluid and Soft Body

A8.47.1P