Grass and dead leaf for Corona and vray render.
There is a 1000cm * 1000cm plane in the scene and includes the following:
3Dsmax File (Corona2015)
3Dsmax File (vray2018 with choas scatter)
3Dsmax File (vray2015, just Base Objects and no scattering).
Textures
Scatter Setting (screenshot of corona scatter setting and choas scatter setting)
FBX and obj file contain 13 grass, dry Leaf and ground and no scatters.
Corona scatter and choas scatter are set to Count, per square, so when changing the size of the grass area, the number of plants will change automatically.