Terragenesis has a nice tutorial on making a hide shelter or tent for your miniature wargames figures. It would be perfect for your cavemen games, as a home for nomadic tribes, or for fantasy beast men or orcs.
modeling
Modeling 15mm Wheat Fields
Here’s a tutorial on modeling 15mm wheatfields for your wargames terrain collection.
The key ingredient in this project are door mats made of coconut matting, called coir matting.
Making Hedges From Scouring Pads
These really look good.