Hello, please check these links:
How to create Carpet:
How to Create Realistic Grass 1:
How to Create Realsitic Grass 2:
For this moment we do not have Corona Scatter as 3ds max have, but in the future, we have in plans, for now, if you want to create realistic grass you must to download extra plugin for Cinema 4D, you can find him on this link:https://www.laubwerk.com/store/surfacespread/ .