For opeluna1, who asked for it!This strip is a reply to Red landscape, Moon, The mirror of the sea, Earthrise, Sky tutorial, Himalaya, Three landscapes, Mountain range, Another cityscape, Sun Tutorial for Supergogeta, Moonlight, Ghostly Moon, The Lair, Landscape, The Doomed Trio, Moantains, Undead land, Strange night, Moantains, Mountains, Mountain view, Moonrise, Mountains at Dawn, A Quick Landscape, Beyond the Mountains ..., mountain, Tierra del Fuego
This shape (left) is the best for making rocky surfaces. Mask it in black and use the black shape to make a solid "rocky-looking" landscape. Then invert the shape and use the new white shape, on low opacity (5-10), to give structure to your rocky landscape,
as seen here below.
A mountain is made in much the same way, this one (left) is made from these shapes (right), that are masked out of the original shape as shown here.