https://gitlab.gnome.org/GNOME/gimp/-/issues/1261
ie. Easier to re-write the description than fix the problem. To be honest, the manual operation is trivial, use solid noise, set your values, set layer mode difference.
Edit: This is the Gimp 2.8 section, so anyone still using Gimp 2.8, have no fears.
Issues can arise, as with that Gimp 2.8 tutorial applied to Gimp 2.10, which shows up the problem of these old tutorials. (and there are plenty of them) A basic understanding of how Gimp works is always best. Unfortunately that comes with time and use.
ie. Easier to re-write the description than fix the problem. To be honest, the manual operation is trivial, use solid noise, set your values, set layer mode difference.
Edit: This is the Gimp 2.8 section, so anyone still using Gimp 2.8, have no fears.
Issues can arise, as with that Gimp 2.8 tutorial applied to Gimp 2.10, which shows up the problem of these old tutorials. (and there are plenty of them) A basic understanding of how Gimp works is always best. Unfortunately that comes with time and use.