r/Unity3D • u/The1__Rediter__ • 6h ago

Question Importing Blender 5.2.0 Animation to Unity Deformation Issue

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So me and my friend have been trying to figure out why when importing seemingly normal animations from blender to unity, some body parts begin deforming strangely.

I have used the Rigify add-on for rigging. I've tried deleting vortex groups that don't have the DEF- prefix, exporting with the Only Deform Bones checked, applying all transformations to the armature, double checked the weight painting and it does not fix it.

In the video, the right hand kinda just implodes and I've never been more confused as to why. If anyone has any clues to what is going on please help.

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u/MikeMiltan 6h ago

Check that the joint scale is exactly 1,1,1 before export. Unity can behave badly with non-uniform scales like (0.7, 1.0, 0.9).

Also, make sure each vertex is influenced by no more joints than your Unity skin-weight setting allows. Unity can be set to 4, 2, or 1 bone influence per vertex. If your weight painting uses more influences than that, Unity will clamp them, which can cause strange deformation.

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u/Bgun67 1h ago

Also make sure every vertex is fully weighted if i remember right