I am playing with a c18 Colonial-style farm scene- Blue Ridge mountains,log cabins, Davy Crockett hats (how sad am I?), shooting squirrels and fishing in the creek. 

I am enjoying myself  and can get some quite pleasing results, but everything renders too neat and tidy, especially the ground. I can stop the green billiard table effect by using a grass texture, but it still looks an obvious plane surface. 
I cannot get the morph tool or magnets to work on it, I presume it is a square plane with no geometry apart from the corner points.

Is there a ground prop that can be morphed into slight irregularities?
Can it be done by bump maps?

I would love to know how other people work on this (using P7, though I have got Bryce 5 waiting to be installed)