Greetings. For my first contribution to this forum, I am presenting a set of gradients for use in GIMP
gradients.jpg
gradients.zip
These can be used on greyscale heightmaps with the "Gradient Map" option.
On Linux, they can be installed by extracting the contents of the ZIP file into. On Windows, there must be a folder for all the things GIMP has well.Code:/home/<your username>/.config/GIMP/2.10/gradients/