I am looking for suggestions on modifying my Christmas layout for Halloween. Essentially, I am looking for ideas on what to do for a white based layout to temporarily change it to a fall theme. The layout base is 4" thick styrofoam painted pure white with an accent that resembles a snowy rock face. The best thing I can think of is some sort of green covering, but that seems lame to me. I am trying to make something that I can setup now and just convert it back to my Christmas layout around Thanksgiving without repainting. The photo below is what I am working with. The goal would be the same track layout but to hide all the white. Any suggestions besides something like felt or artificial turf?