Summary
Exported dna through Expression Editor lacks meshes, (after Export All). Assembling neutral pose from this newly created dna, through expression editor in maya, assembles only joints in viewport and gives maya error:
Warning: Can’t perform polyMergeUV1 on selection
Snippet from maya log file after export
LOG: [WARNING] Skin Definition - The plug-in has found the following skin definition problems : Unable to find the bind pose for : / root / pelvis / spine_01 / spine_02 / spine_03 / spine_04 / spine_05 / neck_01 / neck_02 / FACIAL_C_Neck2Root. No bind poses in the hierarchy containing the object will be exported. Unable to find the bind pose for : / root / pelvis / spine_01 / spine_02 / spine_03 / spine_04 / spine_05 / neck_01 / neck_02. No bind poses in the hierarchy containing the object will be exported. Unable to find the bind pose for : / root / pelvis / spine_01 / spine_02 / spine_03 / spine_04 / spine_05 / neck_01 / neck_02 / head / FACIAL_C_FacialRoot. No bind poses in the hierarchy containing the object will be exported. Unable to find the bind pose for : / root / pelvis / spine_01 / spine_02 / spine_03 / spine_04 / spine_05 / neck_01 / neck_02 / head / FACIAL_C_FacialRoot / FACIAL_C_Forehead. No bind poses in the hierarchy containing the object will be exported. Unable to find the bind pose for :
In outliner meshes are visible, but in viewport there are only joints. This new DNA file size is small 4 031 KB (comparing with original 42 091 KB).
The generated dna file cannot be imported into UE 5.6 as it produces error:
Interchange: Error: [C:/…/…/.dna : ’ ', Unknown] There was no data to import in the provided source data.
I have already tested plugin from release day, and as well v. 1.0.1, tested on maya 2022, maya 2025 and two different PCs and as well UE and 5.6 and 5.5 (possible to import dna, but face is distorted in builds in 5.5)
I have already tried multiple times reinstalling plugins, mayas.
Please select what you are reporting on:
Creative
What Type of Bug are you experiencing?
UI/Tools
Steps to Reproduce
- install maya 2022 or 2025
- install metahuman for maya plugin
- in UE 5.6 assemble for DCC metahuman character in zip archieve and extract it
- import dna through expression editor in maya
- export FBX with skeleton or body dna.
- assemble newly exported face dna in expression editor
- Build neutral pose
Expected Result
Expression editor should create properly mesh layer while exporting new dna
Observed Result
missing meshes after assembling neutral pose, just joints in newly exported face dna
Platform(s)
Windows 11 Pro x64, maya 2022 and 2025, UE 5.6, Metahuman for maya 1.0.0, 1.0.1
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Additional Notes
What’s interesting is that fbx files were exported properly, just dna file lacks meshes. Despite of that, DNA inside UE cannot be updated anyway