Animation in Unity look different than in Blender - riggify addon

Hi,
I am working on a school project and need to import this simple model and animation of a crane to Unity. It was made using a Riggify rig. In Blender the animation looks like this: https://imgur.com/a/APOse0S
And in Unity it looks like this: https://imgur.com/a/OgPGWMH

The difference is in how the left wing and the head are distorted in some parts of the animation. It happens when I export in .fbx and also when I import a .blend file to Unity.

What can I do to fix this?

 

What kind of Unity rig (avatar) is used? Is it Mecanim humanoid or Generic? I suspect that Rigify can throw off mecanim avatar generation by creating extra helper bones.If you use *.fbx export, it should have "Deform bones only" checkbox somewhere. Try it; in theory it should discard bones which do not have influences on the mesh, such as Rigify helpers.

 

@DimitriX89 Thank you for your answer. I'm using Generic rig and when I exported to .fbx I checked the "Deform bones only" checkbox.

 

Then it could be something in the rig that doesnt translate to Blender. Do you know what constraints are used in the wing?

 

I don't know, sorry, i"m a noob.
How do I check that?

 

Selecting a bone in Pose mode will let you view its constraints in Properties - Bone Constraints tab
https://i.gyazo.com/55d0146ccd2f5bc91cd642b19926ee3a.png
Some bones (deform bones) could be hidden, so press Alt+H to unhide all after entering Pose mode.

 

I'm not sure what to look for. Can i upload the .blend file here?

 

Here- most likely no. Maybe using 3rd party file hosting and a link?
But I see what I asked about. The constraint is Copy Transforms; it shouldnt be problematic but I cant be 100% sure. You can also try Pose - Animation - Bake Action (Visual Keying should be enabled) to bake animation before export. *.FBX exporter should bake constraints to keyframes by default, but who knows if it does it wrong.

 

I tried baking, but should I bake having only the rig selected, or the mesh as well?

 

Ideally-your deform bones only. And save a backup file; since it might be better to select Clear Constraints when baking

 

So when I bake the animation in Blender like you said, it looks deformed in the same way as in Unity. What can cause this?

 

It looks like bone is being scaled during animation, while it shouldnt. You can check if the baked animation has any Scale keyframes (Scale on the Transform panel) at these frame times

 

It looks like it happens in these Action frames, but I don't know how to impact them. It starts after frame 43 and all location frames, scale frames etc stop earlier than that. What should I do?

 

Well, you can delete scaling information from bones in Pose mode as shown on screenshot. You definitely have some non-uniform scaling going on.

 

But I don't seem to be able to delete these specific keyframes that are in the "Action" part. I want to delete keyframes from frame 45 to 145 and I can't, when I try to delete them nothing happens. And they seem to be the problem in the wing.

 

I meant, when the bone is selected in Pose mode, you can right click its Scale component in Transform window and select Delete Keyframes. This will clear all the scale animation while leaving other data intact

 

Ok, it somehow finally works! Thank you so much for your help.