3ds max 2011 model. Two types of material: vray and standart with baked textures. Vray version has UVWmap modifier with channel 2 wich controls moss orientation to the ground, so you can rotate each rock on any angle.
OBJ (OBJ, filesize: 222 KB), MAX (Autodesk 3ds Max, filesize: 478 KB), TEXTURES (Textures, filesize: 77.9 MB)