Here are the fills I have made, using the method outlined by Ralf. I have put them in my Mike Schley drawtools.

I wanted to create rocky wastelands for smaller regional maps.

Here is the drawtool page, and the examples.

I have also used a pattern to overlay the underlying fill, to create a further distinctive wasteland fill, for use in much larger maps.

And the symfills I created:

Fabulous maps. I am inspired to try the same style.

But for reference, here is Ahab, my beloved Schipperke (Belgian barge dog - all black with no tail).

The final map for the Hardin region. An archipelago with Wallori (Australian Aboriginal-type) tribes (the Wombat Tribe) in the north; the centre is occupied by a warlike collection of city-states of the Kwetzatl (Aztec-Maya type) people; and the southern island is occupied by the equally ferocious Ming (Chinese-like) who are at war with themselves and the Kwetzatl to the north - the sound separating them has many sunken warships and trade vessels.

And of course, it is a mixed up version of the Falkland Islands aka Islas Malvinas

A larger version is in the Gallery:

Image Gallery: Hardin — ProFantasy Community Forum

Second last map in the region to be completed - the Lavini (Italian-like) nations of Finedesa and Dromidonla. Needless to say, the outlying islands are run by the 'benign' La Familia (aka the Mafia).

Larger version in the gallery.

Image Gallery: Hardin — ProFantasy Community Forum