For a good false cemetery ground we use burlap that has been coated in fiberglass resin. To build one of these false floors the first thinkg you will need to do is build a frame of the size of area you would liek to create. We used 2x4's and framed in a recreation of the area we needed to resemble ground. Once that was done, we began creating a flase ground using chickenwire and other pieces of scrap wood. When your done and you are happy with how your ground looks, cover the chickenwire with plastic, then burlap or fiberglass cloth. You are now ready to begin applying the fiberglass resin. Apply the resin in thin coats and only make as much resin as you will be able to apply in approx 5 minutes. Once you have finished applying the main structural resin, apply one more thin coat of resin to the entire project and sprinkle dry compost into the wet resin. This will give the illusion of a dirt mound. Once the resin is dry your ready to paint in some detail and spray glue some modeling moss onto the entire project. You should now have a pretty sturdy fake dirt mound.