would it be practical to use brick?
Brick, various different looking brick, stone or quick and long lasting ... colored concrete put into forms that look like brick, ... AVOID cement walls that have to be painted, huge maintainance problem forever.
You can also use metal panels, there are also a lot of plastic decorative 'lumber' looking planks and panels... If you can imagine it, I am sure someone has incorporated it in a fence... some look spectacular. KennyV