I (and several other people) have discovered some problems with content creation using Microsoft Windows 10’s free app, Paint 3D. I have updated my original blogpost so you might want to go back and re-read it.
Here’s a Facebook post where we discuss the problems we have encountered. (I’m not sure if you can see this Facebook post if you are not already a member of Facebook. Can somebody please try that link and let me know if it doesn’t work? Thank you.)