Obi is an advanced particle-based physics engine capable of simulating a wide range of deformable material behaviors. Depends on the Burst, Jobs, Collections, and Mathematics packages.
Unity Free Source Code
Although this Unity Asset is typically a paid asset, it is currently available for free download. It’s important to note that this offer is intended strictly for educational purposes or for testing the product before making a purchase, and it should not be utilized for commercial activities
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With Obi Softbody you can simulate complex elastoplastic softbodies composed of thousands of polygons, complete with collisions, self-collisions and rigid body interaction.
Softbodies are physically represented by a set of ellipsoidal particles held together by shape-matching constraints. This way, they can deform both elastically (restoring their rest shape) or plastically (absorbing some of the deformation into their rest shape).
Disclaimer: this is not a clay/mesh sculpting tool, and is not suitable as a starting point to make one. Does not support topological changes in the meshes such as cutting/tearing.
DOWNLOAD LINK: LINK