Not my work… could you do the moss thing with trees?
If so, with enough forward planning, you could conduct the worlds slowest bank robbery by spraying seeds onto the wall, then waiting for the roots to crumble the structure.
Enough of this silliness…
What kind of trails are you building?
DH, Freeride, #Enduro…
Fast and flowy or slow and technical, steep or flat etc etc
A couple of us have been badgering away in the local woods and have all kinds of goodness on the go~ recently been focusing on a freeride line with berm to berm transfers, sharkfins, an on-off and plenty more besides.
Once again, not my work, but could be tempted to knock together something like this:
On a more basic level, off camber entries with a well placed catch are great fun for engineered drift.
I was doing a few laps of your trail there last month samunkim – two-wheel drifting into the little catch berms down toward the bridge jump was marvellous fun.