The terrain was made of Styropor, covered with woodfiller. I tried to make a corn field just befor harvesting by using the bristles of a brush. I think because this was a lot of stupid work I stopped and forgot it ;-)
The "Tree" was made of a small branch. Then I covered it with cotton wool (?) I don´t know the right translation but it was no cotton wool but something I normally use in my aquarium filter. It is a kind of synthetical wool. After spraying it green I covered it with diluted woodglue and scattered some flocks on it. Because the base was so ugly I stopped it that time.
I think I give them a second try....