Okay this is my first scene creation. If you take a look at the stones you will notice a texture called lichen (moss). The lichen is controlled by a mask but for some reason it will not render or even show up in the preview. Please let me know if you find a solution. The zipfile contains two meshes, the newer one uses a mesh to simulate the grass whereas the original scene used strand particle only. I have added mist to the scene but you can easily desconnected the nodes if you like. Enjoy!