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Looked around online for a bit and could not find an answer - most resources are about making a cell fracture + rigid body explosion.

But I don't want an explosion/destruction animation. I just want to animate cracks appearing on a solid block, but nothing explodes or gets pushed out (please see the hand-drawn idea below)

enter image description here

How do I do this?

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  • $\begingroup$ Just to clarify what may already be clear for you : Blender doesn't have a native physics tool for that. But still, you can emulate that with other tools or add-on. $\endgroup$
    – Lutzi
    Commented Apr 27 at 12:11

2 Answers 2

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You could use the AnimAll addon. Activate it. Create the crack on the object with the knife or another tool. Open the Timeline, open the N panel > Animation > activate Key > Points > Location and insert a keyframe:

enter image description here

In the next frames of the Timeline move the vertices and keyframe again, choose a Constant interpolation if you want the cracks to be brutal, result:

enter image description here

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You can use

  • Ivy Generator addon to create curve cracks
  • Shrinkwrap curve to block
  • and animate under Curve Properties - Geometry - Start-End Mapping the End value ...

enter image description here

Or search for some lightning or tree tutorial for geo-nodes (shortest path) techniques.

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