03-07-2018, 04:56 AM
That is a 16 minute video, so I didn't watch it. Just looked at still image in your post.
In Gimp it is called a Bump Map. See here:
https://docs.gimp.org/en/plug-in-bump-map.html
In Gimp it is called a Bump Map. See here:
https://docs.gimp.org/en/plug-in-bump-map.html