I'd had the brown rigged mat kicking around for ages and always had meant to do something with it.
I glued it down to a bit of ply-board to give it solidity. Then I glued cat litter around the edges.
I covered the cat litter in emulsion paint to help bind it together, before painting it various greys.
With the stones in place I then glued the foliage on top.
After that I set about making each field different, using whatever terrain making stuff I had to hand.
Gale force nine autumn mix...
Static grass and water effects