Apologies for replying in this thread, but the solution in the FAQ is not working for me.
I’ve tried adding the “thumbnail” tag in the code, but it’s still showing the previous thumbnail. I remember last I edited the thread there was a way to change the thread thumbnail in the UI that it’s not there anymore.
This is the post I’m trying to edit:
https://blenderartists.org/t/sick-sculpting-sketchbook