@dirsow We couldn't reproduce your issue with just the provided assets, there is nothing obviously wrong with them. Likely your setup in Unity is the cause of the problem. Please check the parent objects of your skeleton, whether you're applying transparency there. With just the minimal screeshot above we can't help unfortunately.
If you still find nothing, please send us a minimal Unity project which still shows this issue. You can send it as a zip package to contact@esotericsoftware.com, briefly mentioning this forum thread URL so that we know the context. And please be sure to delete the unnecessary large Library directory before creating the package.
