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I've been following this tutorial: https://www.youtube.com/watch?v=O5JtP8AZKhU&t=5s It doesn't address, and I cannot find any documentation on how to make only a part of the mesh a softbody.

For example, what if I wanted only Suzanne's ears to be floppy? Not the rest of the head? I am using vertex groups to separate the soft/not soft parts of the mesh, but it's not working right.

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  • $\begingroup$ to add to Blunder's answer, you can also use Cloth to make part of the body floppy $\endgroup$
    – moonboots
    Commented Jul 27, 2021 at 6:54

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Well, this is not a partial soft body because the whole mesh is still a soft body. But if you want to make a Suzanne with floppy ears then set the Goal > Settings > Stiffness to 0.999, and define a Vertex Group for the head without the ears. Use this group for the Vertex Group value of the soft body settings. In the Object section increase Friction to 6.000, and decrease Mass to 0.2 kg.

Yay!
Suzanne with floppy ears

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