The size of the fragment track 1.3 x 1.3m.

With a simple manipulation of the FFD modifier you can start a track along any path.
__________________

In the file with the materials Corona render the grass is planted with the help of the Corona Scatter.

By changing the parameters of the Corona Scatter you can adjust the grass thickness between the stones.

In the file with materials Vray grass and small pebbles are not reproduced. Models of grass and pebbles are attached. You can use the method convenient for you and the plugin.

In the FBX file there are also grass models without a tuned Scatter.
_________________

In the archive:
.MAX 2015 – Corona render Vray
.FBX – Corona render
_________________

Objects textures and materials have correct names. For your convenience all materials are collected in 1 multi-material.

Preview done with Corona render. Vray materials are customized but the final image may vary.