Despite my mistake of gluing the figures intended for these bases to their ordinary plastic bases I still enjoyed this project. Whilst this sort of base may be of limited use for historical types for skirmish fantasy or sci fi it has its place.
The technique is not difficult, cheap air drying modelling clay was used to make a few 3 or 4mm thick "plates"-use a glass or rolling pin to flatten it out....don't worry about it being uneven. When dry it was broken into pieces that were stacked up on each other in the most random way possible, glue it all together using Bostik type glue.
Next I scored in patterns of bricks and stone slabs, the lines need to be a bit deeper and wider than you would at first think or they just dont show up.
Paint was matt black undercoat followed by greys being worked lighter with bone colour paint. The whole flat surface was was washed with Waywatcher Green which gave a nice worn look.
This was an experiment and maybe the bases should have a more unified look as I was hoping to base a unit of 12 Haradrim (?) on them?
Thanks for looking Guys, keep blogging it's where I nick these ideas from (James Wappel take a bow).