Morphs are applied to the wrong target
This creature model works in Morrowind.exe but has issues in OpenMW. devourer2.7z
The model appeared to suffer from the same issue when reimported into Blender. Greatness7 had the following to say about it:
because in vanilla engine the shape keys are relative to the first morph target
and not the actual mesh data
openMW and the importer are probably both making the assumption that the first target (the Basis shape key) is the same as the mesh data
blender actually requires that to be the case, but nif format does not
but it seems to work for re-importing if I do the workarounda bove
so probably will work in openmw too
https://discord.com/channels/210394599246659585/709341072136077332/908579702665515038
https://github.com/Greatness7/io_scene_mw/commit/a9435db17542e000838656e182cc89d134f08922