Maya Unfold/Optimize not working

Torch · Mar 2020

Hi all, have got a very niche issue so not sure if anyone will be able to help, but would be great if anyone can pitch in. Whenever trying to use the Unfold/Optimize features of the Maya UV editor on a mesh I am now constantly getting a "// Error: Unfold3D process error" message. The features do work when unwrapping on simple objects like a cube, sphere, etc. but on more complex geometry it seems to get errors.

Have been trawling the net and pretty sure its based on the fact that I have a Ryzen 3900x CPU installed, causing conflict (another thread with the same issue: https://forums.autodesk.com/t5/maya-forum/unfold3d-process-error/td-p/8679506 ) Also works absolutely fine on my work PC, just not at home. I should add I've also updated the PC's BIOS and downloaded the latest chipset drivers, but still same issue.

Has anyone had similar problems to this/found a work around? Any info would be greatly appreciated. Thanks!

throttlekitty · Mar 2020

Do you get this error every time, or just on a certain mesh?

oglu · Mar 2020

New Ryzen cpu does not support the unfold in maya. Think there is a fix in maya2020.1

Torch · Mar 2020

@throttlekitty - Not every time, just on certain meshes that have more complexity than say the primitives, cubes, spheres etc. It could also be to do with non-manifold geometry, but have run clean up and didn't seem to find any errors. When I extract polys from a mesh, say separate a hand from the body, the piece then unfolds fine - just not when they are one single contiguous mesh.

@oglu - Can confirm still happens on 2020.1.

sprunghunt · Mar 2020

I sometimes get failed unfolds due to bad geometry. I always try a reductive test.

Spilt the mesh in half and try to unfold both pieces. If one fails split that in half unfold those pieces and so on.

oglu · Mar 2020

i checked the release notes. Looks like the fix is not in 2020.1

Torch · Mar 2020

@sprunghunt Have done so, seemed to work after splitting off the hands for example. Only issue is how to find bad geo - I have ran cleanup with all settings and still doesn't show any bad/non-manifold geometry.

Edit: The weird thing is, Unfold along U and V works great, just not the actual Unfold function

Would be nice to be able to use Optimize as well, but for now just using the legacy version.

oglu · Apr 2020

But the fix is in 2019.3
https://help.autodesk.com/view/MAYAUL/2019/ENU/?guid=Maya_ReleaseNotes_2019_3_release_notes_html

Many users on systems with newer, high-end CPUs like Ryzen 3900x series have reported issues and 'Unfold3D Process Error' messages when unwrapping or optimizing UVs. If you run Maya using one of these high performance CPUs, you can now set the environment variable MAYA_USE_ALTERNATE_UNFOLD_SHIM = 1 to use the Unfold3D tools. MAYA-103288

ddankhazi · May 2020

Fix for Maya 2020.1
https://forums.autodesk.com/t5/maya-forum/unfold3d-process-error/m-p/9431245/highlight/true#M80365

oglu · May 2020

Maya2020.2 does have a fix now.
https://help.autodesk.com/view/MAYAUL/2020/ENU/?guid=Maya_ReleaseNotes_2020_2_release_notes_html

davidecruza · Jun 2020

FOR RYZEN USERS

I found this in an Autodesk forum, it works for Ryzen 3, Ryzen 5, Ryzen 7, Ryzen 9, and Ryzen Threadripper!

"I took a closer look and it looks like it is using some kind of 2017 version of Unfold (assuming by the name of the new file that appeared in bin folder of Update 3)

There are two new files in Update 3 for Maya 2019:

unfold3dlib.dll - 99.8MB - sha1 a9799263f360ed3c860980c986aefd5031fe0591

UnfoldShim2017.exe - 122kB - sha1 38a508efe9df78ab8b8f4bfc54edac7628bdc48c

So there is a way how to run Unfold3D in Maya 2020.1 now (if you are running on Ryzen or Threadripper):

1. download and extract unfold.rar

2. copy and replace files in C:\Program Files\Autodesk\Maya2020\bin

(UnfoldShim2017.exe is already renamed to UnfoldShim.exe, so you just need to replace the file, consider backup the original."

CrustedInk · Aug 2020

wow, thank you so much for that fix.

Spruceroot · Sep 2020

Thank You !! Works in 2020.2

vexinglion · Dec 2020

Awesome! thank you.

Davis237 · Jul 2021

Yo! Just wanted to say thanks for this post, i don't use Ryzen, have a 1080gtx and randomly while modeling i try to use unfold and all these errors popped up saying a .dll was missing, and after googling the error i found this post and the fix worked for it as well. Thanks again!

VBV · Jul 2021

Thank you. That fix worked for 2020.2 too.

Maya Unfold/Optimize not working

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