I am trying to make a scene where a softbody cube falls into a long spinning rectangular rigid mesh, but it turns out that both doesn't interact with each other as the cube just falls through and ignores the movement of the animated mesh.

I know for a fact that softbody can interact with rigid body because the softbody cube falls into a plane that has a rigid body property, but apparently it doesn't work when the rigid body has animation.

I looked up on YouTube for this but found nothing.

  • $\begingroup$ You "know for a fact" that soft bodies can interact with rigid bodies? Yes, they can - but not by default, only if the rigid body object has a Collision modifier. And then it works no matter if animated or not, as the answer from @Chris shows. $\endgroup$ Commented Feb 6, 2023 at 9:02

1 Answer 1


Just give your rigid body a collision modifier, and it works:

enter image description here

  • $\begingroup$ I literally asked openai how to add collision modifier to a rigid body, thanks for the info anyways $\endgroup$
    – KD_
    Commented Feb 6, 2023 at 10:40
  • $\begingroup$ @KD_ Well, as Ray commented on a different question a few days ago: "First - I would strongly recommend against using ChatGPT as a general knowledge engine. It has frequently been shown to provide confident, totally incorrect answers." ChatGPT had given (-3, -3, 3) as the dot product of (3, 0, 0) and (0, 0, 1), which is utter nonsense. $\endgroup$ Commented Feb 6, 2023 at 11:22

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