How to apply a soft body simulator on a certain part of an object? I am currently trying to make a jellyfish animation and I want to make it so that the 4 big tentacles slowly flop around, as if they're in water. In order to accomplish this, I'm attempting to create a vertex group for the tentacles and apply a soft body simulator to it. The goal is to make it so that the tentacles flop around like the moon jellys in this video
, while, at the same time, the main body keeps its consistency. Unfortunately, I'm having problems with the soft body simulator. Whenever I apply it, the whole thing distorts like this:



I've spent the whole day trying to figure this out, and haven't had any luck whatsoever. I read another forum somewhere that said to apply a rigid body with the soft body, but I haven't had any luck with that either.

Does anyone know how to apply the soft body simulator on a certain part of your mesh???

Here's a copy of my project.
Cloth simulation Pin Group should do the trick. Just assign the non moving vertices to a specific group and use it in the Shape/Pin Group field of the cloth simulation settings panel.