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Bug Report: Importing skeletal mesh FBX corrupts parts of mesh

I'm trying to import this skeletal mesh from maya but I keep getting weird deformations in my model when I bring it into Unreal:

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Here's what my model looks like in Maya:

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Here are my Maya FBX export settings:

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Here are my Unreal import settings:

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How can I fix these spiky parts of the mesh on import?

Product Version: UE 4.12
Tags:
hand4.png (744.3 kB)
hand1.png (86.6 kB)
hand2.png (23.4 kB)
hand3.png (90.3 kB)
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asked Sep 16 '16 at 06:36 PM in Using UE4

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janimationd
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avatar image janimationd Sep 19 '16 at 10:31 PM

I have confirmed that this behaves the same in a fresh 4.12 project. I've linked the fbx file I am trying to import in the original post.

avatar image janimationd Sep 19 '16 at 10:39 PM

I can also open the fbx in other software without this issue. It appears to be Unreal-specific. Changing this to a bug report.

avatar image AlexW88 Sep 20 '16 at 08:32 AM

This usually happens when one or more vertices have no Weights/bones assigned to them. You have to fix this in maya by weightpainting the specific vertices.

avatar image janimationd Sep 20 '16 at 04:19 PM

As far as I can tell all of my vertices have weights associated with them. I don't think Maya even allows you to have vertices that are unweighted, if you "erase" weights from a vertex they get reassigned to another one.

avatar image AlexW88 Sep 20 '16 at 04:38 PM

I can check this for you if you want, just link me the fbx somewhere.

avatar image janimationd Sep 20 '16 at 04:50 PM

It's linked in the original question, here it is again https://drive.google.com/file/d/0B3u_hzolRrMjc1FSbE82NDFtWjA/view?usp=sharing. Thanks!

avatar image AlexW88 Sep 20 '16 at 05:06 PM

Unfortunately I can't open the original file so I can't say for sure it's the weightpaint. exp- and reimporting it from within unreal fixes the mesh, however this breaks the bone rotations

avatar image janimationd Sep 20 '16 at 05:12 PM

Do you have an older version of Maya / FBX importer? I can either give you my maya project or an export using a different version of the FBX exporter

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answered Sep 20 '16 at 08:27 AM

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A GUPTA
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avatar image A GUPTA Sep 20 '16 at 12:31 PM
avatar image janimationd Sep 20 '16 at 04:20 PM

It looks like this tutorial is only for static meshes...

avatar image janimationd Sep 20 '16 at 04:23 PM

Would you mind listing which settings I missed? I added the import setting to preserve smoothing groups but it didn't help.

avatar image A GUPTA Sep 20 '16 at 05:02 PM

Please give some time i just now came online let me try it out with your mesh in my pc

avatar image A GUPTA Sep 20 '16 at 05:22 PM

Hey there is some problem with your export setting but I tried using the fbx converter and it was not able to convert the file..

avatar image janimationd Sep 20 '16 at 05:29 PM

What are you trying to convert the file to?

avatar image A GUPTA Sep 20 '16 at 05:33 PM

Well the file says corrupt and it does not show up so I could not proceed . Let me find you any alternate solution . I am trying to import it in blender then see if the export works..

avatar image A GUPTA Sep 20 '16 at 05:41 PM

well the file is corrupt and I am getting an error log.

avatar image janimationd Sep 20 '16 at 05:48 PM

I ran a cleanup on my mesh and it was altered a bit by it. I'll let you know if that fixes anything.

avatar image janimationd Sep 20 '16 at 05:58 PM

A cleanup didn't fix the issue. I can make the issue go away if I set all vertices weighted fully to my root joint, which makes me think that there is something inherently wrong with the vertices around the thumb on my model.

I'm planning on remodeling this mesh anyways, so I'm probably just going to give up on this for now, and see if it pops up again after I make my new model. If any Epic Games staff wants to know more about my issue let me know.

avatar image A GUPTA Sep 20 '16 at 06:01 PM

Yeah that is probably a wiser idea . Well if you are in a hurry try out turbo squid
the have free rigged models

avatar image A GUPTA Sep 20 '16 at 06:05 PM

try this vid out do as it instructs then see if you can import it . If not it is some bigger issue yet to be solved... https://www.youtube.com/watch?v=4kUIEd76YI4

avatar image A GUPTA Sep 20 '16 at 06:11 PM

hey try the forums with this question and error . You will get more help there also.

avatar image A GUPTA Sep 20 '16 at 06:27 PM

the MAYA Rigging tool is Officially been tested on Maya 2012 - 2014 .

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