This is an older build I neglected to post. I needed a bunch of briar and bramble terrain for a Rangers of Shadow Deep scenario, and wanted to make something that figures could move into or through.
I settled on making flat 'area bases' using Hardboard (Masonite) cut to ovals and irregular bean shapes, and textured them with sand and wood filler. They were then painted with craft paint- dark brown, drybrush medium brown, and final light drybrush with a light brown.
The brambles are made with one of my favorite materials, the green furnace filter that I use for all sorts of things. I teased and cut it apart to form loose briar like forms and spray painted the patches brown and gray.
The next step is gluing on flocking material- I use Woodland Scenics. I went with a variety this time.
The final step is a liberal spraying of "Plasti-Dip" Clear, to seal it all up and keep the flock on the brambles.
I don't glue the bramble patches on- they're just set on top so that they can be moved around to accommodate miniatures, yet the 'difficult ground' area is marked.