If it's not completely obvious it will most likely blend in with the vegetation.

If you want to stop people from going over a rock edge, why would you want it to be camouflage? Wouldn't you want people to actually see it? It just sounds like you want to spend a lot of money, for no good reason.

It makes no sense if the purpose is to keep players flying from the edge but almost impossible to see. Why do you need it to blend with the surrounding anyways? Get a brightly colour rope and add strips of caution tape every 5-10 feet along it. Also, keep it about 20 feet from the edge so potential flyers have a chance to think about it. Like what Deadpool said, "go bright or go home".

As I said before, a guy running could dismiss dyed burlap from his peripheral vision and just run through it.

Stress coupled with adrenaline can make you miss things that aren't obvious.

Ok ok, Its my father's land and he doesnt want flashy orange fences in the woods. Thats the main reason, I approched him about it and he said no straight off

Then it's your call as to what is more important. People's lives and safety or the barrier doesn't match the colour of the trees and leaves.

I'll think of something thanks for the help and suggestions guys!