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I am animating a fight between two characters and I ran into a scene where I wanted one of the character's weapons to shatter like glass when the other character slices it. I have used a few things that supposedly do this including the cell fracture add-on but it did never finishes they top part of the sword , but the methods I've found do not work with a sword such as a katana.

I'm hoping for a way to either make the cell fracture work or find another way to break the object like glass.

here is what happens when i try to use the cell fracture on the katana:

enter image description here

Here is the original katana in edit mode:

enter image description here

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    $\begingroup$ have you tried the cell fracture addon? $\endgroup$ – aliasguru Aug 16 '16 at 5:41
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    $\begingroup$ Could you please specify what 'it does not work' means? It's unclear at the moment what you're trying to achieve. $\endgroup$ – aliasguru Aug 17 '16 at 10:15
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    $\begingroup$ there is a youtube tutorial series here on how to shatter a coffee cup, it might be a similar effect to what you're trying: youtube.com/… The special thing is, they use the Grease Pencil to define the shard distribution, so there's a lot of control for the shatter effect. $\endgroup$ – aliasguru Aug 17 '16 at 19:44
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    $\begingroup$ add more detail as to how the cell fracture is not working $\endgroup$ – A guest Aug 18 '16 at 23:03
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    $\begingroup$ Cell fracture may create result like that when the original mesh is non-manifold. Enter Edit mode, choose either Vertex or Edge selection mode and run Ctrl+Alt+Shift+M. If something is selected most liklely it's the problem. $\endgroup$ – Mr Zak Aug 24 '16 at 8:59
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The Cell Fracture addon can create sometimes results with parts not cut out. One possible reason for that is non-manifold geometry; as long as mesh will be non-manifold it won't be broken well enough by the addon. You can test that with default monkey (as it's non-manifold because of the eyes):

screenshot of fractured monkey

The areas which have unfinished fractures are ones near the eyes and this is one way to determine where non-manifold geometry is present. Use Ctrl+Alt+Shift+M to make non-manifold parts selected, Mesh Lint addon and others. There are some certain techniques used for repairing such areas listed in the linked answers.

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  • $\begingroup$ i actually fixed it a while ago but thanks $\endgroup$ – A guest Nov 27 '16 at 20:56

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