for the record,
this is a terrible name for this thread.
I like to use carpet padding for trees, take a soldering iron and carve the bark in it. Do it outside and perhaps with a respirator, then paint dark brown and drybrush with light gray. I recently did a ton of vines for a pumpkin patch. I took a roll of commercial paper towels (the brown ones like from a restroom dispenser non segmented) and mixed Elastomeric roof coating and latex paint (green in my case, most likely brown for you) and ran the towel strand through my mix and twisted and bunched it as it came out, then I hung it to dry in a way that it does not touch itself.
I considered sprinkling some peat moss onto it but I decided against it, you might want to.